Wednesday, January 26, 2011

Audi A3 Service Manual Repair Guide

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download : PDF Books Audi A3 Service Manual Repair Guide
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Friday, January 21, 2011

Audi S4 Limo Avant Owners Manual

Audi S4 Limo Avant Manual User This front mounted intercooler apply for Audi S4 Limo Avant Passat. Tools required : vehicle lift or Jack and axle stands, T25 and T30 Torx drivers, 6mm Allen key or socket, 7mm spanner, 10mm spanner, flat and pozzidrive screwdrivers, hacksaw (blade for cutting aluminium), drill and 6mm drill bit. Large side cutters, craft knife Overalls, safety footwear, latex gloves and safety glasses are also recommended. Follow this manual carefully.

download : Audi S4 Limo Avant Owners Manual

Detail download here

Audi S4 2003 Owners Manual

Audi S4 2003 Owners Manual This front mounted intercooler apply for Audi S4 2003 Passat. Tools required : vehicle lift or Jack and axle stands, T25 and T30 Torx drivers, 6mm Allen key or socket, 7mm spanner, 10mm spanner, flat and pozzidrive screwdrivers, hacksaw (blade for cutting aluminium), drill and 6mm drill bit. Large side cutters, craft knife Overalls, safety footwear, latex gloves and safety glasses are also recommended. Follow this manual carefully.

download : Audi S4 2003 Owners Manual
Detail download here

Audi S8 Owners Manual

Audi S8 Owners Manual This front mounted intercooler apply for Audi S8 Owners Manual Passat. Tools required : vehicle lift or Jack and axle stands, T25 and T30 Torx drivers, 6mm Allen key or socket, 7mm spanner, 10mm spanner, flat and pozzidrive screwdrivers, hacksaw (blade for cutting aluminium), drill and 6mm drill bit. Large side cutters, craft knife Overalls, safety footwear, latex gloves and safety glasses are also recommended. Follow this manual carefully.

download : Audi S8 Owners Manual
Detail download here

Thursday, January 20, 2011

Ding dong Doorbell Circuit Using IC 8021-2

This simple and low cost ding dong electronic doorbell circuit is Using IC 8021-2. The IC has an in-built circuitry to produce ding dong sound each time its pin 3 is pulled low. If you try to press switch S2 a second time when the first ding dong sound is still being produed, it has no effect whatever and the two ding-dong bell sounds will be invariably produced.S1 is the ON- OFF switch.
Ding dong Bell Dor  Circuit
You may either use a piezo tweeter or an 8-ohm, 500mW speaker at the output. During the standby period, the IC consumes nominal current of a few microamperes only. Therefore switch S1 may be kept closed. Each time switch S2 is pressed, ding dong sound is produced twice. If you try to press switch S2 a second time when the first ding dong sound is still being produed, it has no effect whatever and the two ding-dong bell sounds will be invariably produced.
Detail download here

Simple Doorbell Circuit Using LF351 Op-Amp

This is a electronic doorbell circuit schematic has a very simple function and is very easy to build. This door bell circuit use a LF351 operational amplifier and other few common electronic components . When the S1 push-button is depressed an initial positive voltage is placed on the C2 and the non-inverting terminal of the LF351 operational amplifier and the circuit will oscillate at a low frequency .
Dor Bell Circuit Using  LF351 Op-Amp
 LF351 Pinout
The used speaker for this project must have a impedance between 40 -80 ohms . The door buzzer electronic circuit need to be powered using a 9 volts DC power supply .
Detail download here

Simple Electronic lock Circuit Using IC 555

A simple electronic key code lock circuit that require few external components can be constructed using this project. This electronic lock circuit is based on a common 555 timer circuit and some other common components .

This low cost key code circuit use six switches that needs to be pressed to open the lock, but only two switches at a time. In many other , more expensive electronic circuits the key code is formed by pressing some switches one by one , not like in this case two switches . If you don’t like to press two switches in the same time you can eliminate one switch , but in that case the code can be more easy to guess by someone ells. Thus a total of three sets of switches have to be pressed in a particular sequence. (Of these three sets, one set is repeated.)

Simple Electronic lock Circuit Using IC 555

Pin 2 of 555 timer is the triggering input pin which, when held below 1/3 of the supply voltage, drives the output to high state. The threshold pin 6, when held higher than 2/3 of the supply voltage, drives the output to low state. By applying a low-going pulse to the reset pin 4, the output at pin 3 can be brought to the quiescent low level. Thus the reset pin 4 should be held high for normal operation of the IC.

Three sets of switches SA-SC, S1- S8 and S3-S4 are pressed, in that order, to open the lock. On pressing the switches SA and SC simultaneously, capacitor C3 charges through the potential divider comprising resistors R3 and R4, and on releasing these two switches, capacitor C3 starts discharging through resistor R4. Capacitor C3 and resistor R4 are so selected that it takes about five seconds to fully discharge C3.

Depressing switches S1 and S8 in same time, within five seconds of releasing the switches SA and SC, pulls pin 2 to ground and IC 555 is triggered. The capacitor C1 starts charging through resistor R1. As a result, the output (pin 3) goes high for five seconds . Within these five seconds, switches SA and SC are to be pressed momentarily once again, followed by the depression of last code-switch pair S3-S4.

These switches connect the relay to output pin 3 and the relay is energised. The contacts of the relay close and the solenoid pulls in the latch (forming part of a lock) and the lock opens. The remaining switches are connected between reset pin 4 and ground. If any one of these switches is pressed, the IC is reset and the output goes to its quiescent low state. The given circuit can be recoded easily by rearranging connections to the switches as desired by the user.
Detail download here

Simple Traffic Light Using 4017 Counter

This circuit operates red, kuning and green LEDs in the correct sequence for a single traffic light. The time taken for the complete red - red & amber - green - amber sequence can be varied from about 7s to about 2½ minutes by adjusting the 1M preset. Some amber LEDs emit light that is almost red so you may prefer to use a yellow LED.
Simple Traffic Light circuit
The 555 astable circuit provides clock pulses for the 4017 counter which has ten outputs (Q0 to Q9). Each output becomes high in turn as the clock pulses are received. Appropriate outputs are combined with diodes to supply the amber and green LEDs. The red LED is connected to the ÷10 output which is high for the first 5 counts (Q0-Q4 high), this saves using 5 diodes for red and simplifies the circuit.

List Component of Simple Traffic Light Circuit
  • Resistors : 470 ×3, 22k, 100k
  • Capacitors : 0.1µF, 1µF 16V radial, 10µF 16V radial
  • Diodes : 1N4148 ×6
  • LEDs : red, amber (or yellow), green
  • 1M preset, horizontal
  • 555 timer IC, such as NE555
  • 4017 counter IC
  • on/off switch
Detail download here

LDR Light sensitive Alarm

The circuit detects a sudden shadow falling on the light-sensor and sounds the bleeper when this happens. The circuit will not respond to gradual changes in brightness to avoid false alarms. The bleeper sounds for only a short time to prevent the battery running flat. Normal lighting can be used, but the circuit will work best if a beam of light is arranged to fall on the light-sensor. Breaking this beam will then cause the bleeper to sound. The light sensor is an LDR (light-dependant resistor), this has a low resistance in bright light and a high resistance in dim light.
LDR Light sensitive Alarm Circuit


Note:
  • The light-sensitivity of the circuit can be adjusted by varying the 100k preset.
  • The length of bleep can be varied from 0.5 to 10 seconds using the 1M preset.
Using the 7555 low-power timer ensures that the circuit draws very little current (about 0.5mA) except for the short times when the bleeper is sounding (this uses about 7mA). If the circuit is switched on continuously an alkaline PP3 9V battery should last about a month, but for longer life (about 6 months) you can use a pack of 6 AA alkaline batteries.


Circuit From: www.kpsec.freeuk.com
Detail download here

Audio Peak Level Indicator by Op-Amp LM324

This circuit was designed to provide a valuable test equipment tool for sound reinforcement systems like guitar amplifiers and the like. Used in conjunction with a signal generator it can be of considerable help in setting and controlling levels through any amplifying chain.
Audio Peak Level Indicator Circuit
The circuit is formed by an input buffer and ac to dc voltage converter (IC1A) feeding a window comparator (IC2A, IC2B, IC2C) which illuminates one of three LEDs at a time. No setup is required: if correct values are used for resistors R3 to R7, LED D1 will illuminate at 0dB input (0.775V RMS), LED D2 at +5dB input (1.378V RMS) and LED D3 at +10dB (2.451V RMS).

Note:
  • Maximum current drawing: 12mA when one of the three LEDs is illuminated and less than 4.5mA when the input level is below 0.775V.
  • LEDs of different colors can be used to mark any of the three different levels.
  • Input pins of unused op-amps must be tied to negative ground. Output pins must be left open (see the upper left corner of the drawing).
List Component of Audio Peak Level Indicator Circuit
R1       : 300K  1/4W Resistor
R2 : 1M2 1/4W Resistor
R3 : 510K 1/4W Resistor
R4 : 220K 1/4W Resistor
R5 : 91K 1/4W Resistor
R6 : 160K 1/4W Resistor
R7 : 56K 1/4W Resistor
R8,R9 : 100R 1/4W Resistors
R10 : 220R 1/4W Resistor
C1 : 100nF
C2 : 1µF/63V
C3 : 10µF/25V
D1,D2,D3 : LEDs (Any coloring at will)
IC1 : LM393
IC2 : LM324
IC3 : 78L05
SW1 : SPST Toggle or Slider Switch


Circuit From: www.redcircuits.com
Detail download here

Sunday, January 16, 2011

Car Battery Voltage Indicator

Connecting this circuit to the battery of your vehicle, you will always know at a glance the approximate voltage available. An indication of battery voltage is useful to the motorist for monitoring the battery's capacity to deliver current, and as a check on the efficiency of the dynamo or alternator.

Threshold voltages of the LEDs are set by means of two Zener Diodes (D6 & D10) plus two further Diodes wired in series (D4, D5 and D8, D9 respectively) adding a step of about 1.3V to the nominal Zener voltage.

Car Battery Voltage Indicator Circuit
Note:
  • Red LED (D1) is on when battery voltage is 11.5V or less.
  • Amber LED (D2) is on when battery voltage is comprised in the 11.5 - 13.5V range. This indicates that the battery is good if the car  is off. When car is running, this indicates no charge from dynamo or alternator.
  • Green LED D7 is on when battery voltage is 13.5V or more. This indicates a normal condition when car is running and dynamo or alternator are charging.
List Componet Of Car Battery Voltage Indicator Circuit

R1,R3,R6    : 1K   1/4W Resistors
R2 : 100K 1/4W Resistor
R4,R5,R7,R8 : 3K3 1/4W Resistors
D1 : Red LED
D2 : Amber LED
D3,D4,D5 : 1N4148 150mA Diodes
D6 : BZX79C10 10V 500mW Zener Diode
D7 : Green LED
D8,D9 : 1N4148 150mA Diodes
D10 : BZX79C12 12V 500mW Zener Diode
Q1,Q2 : BC547 NPN Transistors
Q3 : BC557 PNP Transistor 

Circuit From: www.redcircuits.com
Detail download here

18 Watt RMS Amplifier Using TIP41|42

This amplifier Circuit has output 18 Watt RMS into 8 Ohm and Frequency response 30Hz to 20KHz. It’s simple to build and you don’t need preamplifier. Besides that this Amplifier Circuit is also directly connected to Can some CD players, tuners and recorders tape. Do not exceed 23 + 23V supply. Of Q3 and Q4 must be mounted on heatsink. D1 must be in thermal contact with the Q1. Quiescent current (best measured with an Avo-meter in series with Q3 Emitter), is not critical. Adjust R3 to read a current Between 20 to 30 mA with no input signal.

18 Watt  RMS Amplifier Using TIP41|42 Circuit

List Component:
P1    : 2K   Log. Potentiometer (Dual-gang for stereo)
R1    : 1K   1/4W Resistor
R2    : 4K7  1/4W Resistor
R3    : 100R 1/4W Resistor
R4    : 4K7  1/4W Resistor
R5    : 82K  1/4W Resistor
R6    : 10R  1/2W Resistor
R7    : R22  4W Resistor (wirewound)
R8    : 1K   Trimmer Cermet (optional)
C1    : 470nF    Polyester Capacitor
C2,C5 : 100µF/3V Tantalum bead Capacitors
C3,C4 : 470µF/25V Electrolytic Capacitors
C6    : 100nF   Polyester Capacitor
D1    : 1N4148  150mA Diode
IC1   : TLE2141C  Op-amp
Q1    : BC182   NPN Transistor
Q2    : BC212   PNP Transistor
Q3    : TIP42A  PNP Transistor
Q4    : TIP41A  NPN Transistor
Detail download here

IRF9530|IRF530 Simple MosFet Amplifier

This mosFet amplifier circuit was a sort of challenge: designing an audio amplifier capable of delivering a decent output power with a minimum parts count, without sacrificing quality.
The Power Amplifier section employs only three transistors and a handful of resistors and capacitors in a shunt feedback configuration but can deliver more than 18W into 8 Ohm with <0.08% THD @ 1KHz at the onset of clipping (0.04% @ 1W - 1KHz and 0.02% @ 1W - 10KHz) and up to 30W into a 4 Ohm load.

IRF9530|IRF530  Simple MosFet   Amplifier Circuit

List Component
R1 : 2K2 
R2 : 27K 
R3,R4 : 2K2 1/2W Trimmers Cermet or Carbon (or 2K)
R5 : 100R 
R6 : 1K 
R7,R8 : 330R 

C1 : 22µF/25V
C2 : 47pF 
C3,C4 : 100µF/50V  
C5 : 2200µF/ 50V
Q1 : BC550C 
Q2 : IRF530 
Q3 : IRF9530 

Setting up the Power Amplifier:
  • Connect the Power Supply Unit (previously tested separately) to the Power Amplifier but not the Preamp: the input of the Power Amplifier must be left open.
  •  Rotate the cursor of R4 fully towards Q1 Collector.
  • Set the cursor of R3 to about the middle of its travel.
  • Connect a suitable loudspeaker or a 8 Ohm 20W resistor to the amplifier output.
  • Connect a Multimeter, set to measure about 50V fsd, across the positive end of C5 and the negative ground.
  • Switch on the supply and rotate R3 very slowly in order to read about 23V on the Multimeter display.
  • Switch off the supply, disconnect the Multimeter and reconnect it, set to measure at least 1Amp fsd, in series to the positive supply (the possible use of a second Multimeter in this place will be very welcomed).
  • Switch on the supply and rotate R4 very slowly until a reading of about 120mA is displayed.
  • Check again the voltage at the positive end of C5 and readjust R3 if necessary.
  •  If R3 was readjusted, R4 will surely require some readjustment.
  • Wait about 15 minutes, watch if the current is varying and readjust if necessary.
  • Please note that R3 and R4 are very sensitive: very small movements will cause rather high voltage or current variations, so be careful.
  • Those lucky enough to reach an oscilloscope and a 1KHz sine wave generator, can drive the amplifier to the maximum output power and adjust R3 in order to obtain a symmetrical clipping of the sine wave displayed.
Circuit From: www.redcircuits.com

    Detail download here

    70 Watt Guitar Amplifier Using 2N30055/MJ2955 Transistor

    The Guitar power amplifier circuit of this design adopts the still new but already successful 45 Watt Class B Amplifier Simplicity and ease of construction of this amplifier, combined with the complete absence of manual settings make it ideal for Guitar or Bass amplifier.
    70 Watt Guitar Amplifier Circuit

    Preamplifier + Tone Control  For Guitar Amplifier Circui

    The preamplifier features two almost identical three-transistor gain-blocks based on a complementary two-stage circuit with dynamic active load of the output transistor. A circuit topology early used in Revox tape recorders and audio preamplifiers with single rail supplies in the 18 - 24Vdc range.

    In this preamp the gain blocks are powered by split supplies of ±24V with two advantages: a high output voltage of about 15V RMS allowing a very wide overload margin and the facility to easily derive the preamp power supply from the power amplifier main supply.

    A three-band stacked-type tone control is implemented in the second stage but, unlike the more common passive controls, active controls are used here, allowing better signal to noise ratio and overload margin with no gain loss.

    List Componet Of  Guitar Amplifier
    R1             : 8K
    R2 : 3K9
    R3,R6 : 1K
    R4 : 2K2
    R5 : 15K
    R7 : 22K
    R8 : 330R
    R9,R10 : 10R
    R11,R12 : 47R
    R13 : 10R

    C1 : 1µF/63V
    C2 : 470pF/63V
    C3 : 47µF/25V
    C4 : 15pF/63V
    C5 : 220nF/100V
    C6 : 100nF/63V
    D1,D2,D3,D4 : 1N4148 150mA Diodes

    Q1,Q2 : BC560C PNP Transistors
    Q3 : Q4BC556 PNP Transistors
    Q5 : BC546 NPN Transistor
    Q6 : BD139 NPN Transistor
    Q7 : BD140 PNP Transistor
    Q8 : MJ2955 PNP Transistor
    Q9 : 2N3055 NPN Transistor

    List Componet Of  Preamplifier
    P1             : 10K  Potentiometer
    P2,P3,P4 : 47K Potentiometers
    P5 : 10K Potentiometer

    R1,R2 : 33K
    R3 : 220K
    R4 : 390R
    R5,R14 : 3K9
    R6,R15 : 8K2
    R7,R16 : 12K
    R8,R11,R17,R20 : 560R
    R9,R18 : 5K6
    R10,R19 : 100R
    R12 : 3K3
    R13 : 18K
    C1,C12 : 220nF Polyester Capacitors
    C2,C13 : 100pF Ceramic Capacitors
    C3,C14 : 10pF Ceramic Capacitors
    C4,C15 : 47µF/25V Electrolytic Capacitors
    C5,C16 : 100µF/25V Electrolytic Capacitors
    C6,C7 : 10µF/25V Electrolytic Capacitors
    C8,C11 : 4n7 Polyester Capacitors
    C9 : 10nF Polyester Capacitor
    C10 : 47nF Polyester Capacitor

    Q1 : BC560C PNP Transistor
    Q2,Q3,Q5,Q6 : BC546 NPN Transistors
    Q4 : BC557 PNP Transistor 
     
    Circuit From: http://www.redcircuits.com/ 
    Detail download here

    Thursday, January 13, 2011

    18W Guitar Amplifier Using Darlington Transistor

    The aim of this design is to reproduce a Combo amplifier of the type very common in the 'sixties and the 'seventies of the past century. It is well suited as a guitar amplifier but it will do a good job with any kind of electronic musical instrument or microphone. 5W power output was a common feature of these widespread devices due to the general adoption of a class A single-tube output stage (see the Vox AC-4 model). Furthermore, nowadays we can do without the old-fashioned Vib-Trem feature frequently included in those designs. The present circuit can deliver 10W of output power when driving an 8 Ohm load, or about 18W @ 4 Ohm. It also features a two-FET preamplifier, two inputs with different sensitivity, a treble-cut control and an optional switch allowing overdrive or powerful treble-enhancement. 

    18W Guitar Amplifier Using Darlington Transistor Circuit
    Note:
    • SW1 and related capacitors C4 & C5 are optional.
    • When SW1 slider is connected to C5 the overdrive feature is enabled.
    • When SW1 slider is connected to C4 the treble-enhancer is enabled.
    • C4 value can be varied from 100nF to 470nF to suit your treble-enhancement needs.
    • To set quiescent current, remove temporarily the Fuse F1 and insert the probes of an Avo-meter in the two leads of the fuse holder.
    • Set the volume control to the minimum and Trimmer R9 to its minimum resistance.
    • Power-on the circuit and adjust R9 to read a current drawing of about 25 to 30mA.
    • Wait about 15 minutes, watch if the current is varying and readjust if necessary.

    List Component:
    P1           : 4K7  Linear Potentiometer
    P2 : 10K Log. Potentiometer
    R1,R2 : 68K 1/4W Resistors
    R3 : 220K 1/4W Resistor
    R4,R6,R11 : 4K7 1/4W Resistors
    R5 : 27K 1/4W Resistor
    R7 : 1K 1/4W Resistor
    R8 : 3K3 1/2W Resistor
    R9 : 2K 1/2W Trimmer Cermet
    R10 : 470R 1/4W Resistor
    R12 : 1K5 1/4W Resistor
    R13 : 470K 1/4W Resistor
    R14 : 33K 1/4W Resistor
    C1 : 100pF Ceramic Capacitor
    C2 : 100nF Polyester Capacitor
    C3 : 470µF Electrolytic Capacitor
    C4 : 220nF Polyester Capacitor (Optional, see Notes)
    C5 : 47µF/25V Electrolytic Capacitor (Optional, see Notes)
    C6 : 1µF/63V Polyester Capacitor
    C7,C8,C9,C10 : 47µF/25V Electrolytic Capacitors
    C11 : 47pF/63V Ceramic Capacitor
    C12 : 1000µF/35V Electrolytic Capacitor
    C13 : 2200µF/35V Electrolytic Capacitor
    D1 : 5mm. Red LED
    D2,D3 : 1N4004/400V 1A Diodes
    Q1,Q2 : 2N3819 General-purpose N-Channel FETs
    Q3 : BC182 NPN Transistor
    Q4 : BD135 NPN Transistor (See Notes)
    Q5 : BDX53A NPN Darlington Transistor
    Q6 : BDX54A PNP Darlington Transistor
    SW1 : pole 3 ways rotary switch 
    SW2          : SPST Mains switch
    F1 : 1.6A Fuse with socket
    T1 : 220V Primary, 48V Center-tapped Secondary 20 to 30VA Mains transformer
    Detail download here

    Wednesday, January 12, 2011

    Simple FET Audio Mixer

    This simple circuit mixes two or more channels into one channel (eg. stereo into mono). The circuit can mix as many or as few channels as you like and consumes very little power. The mixer is shown with two inputs, but you can add as many as you want by just duplicating the "sections" which are clearly visible on the schematic.

    Simple  FET  Audio Mixer

    Note:
    • As many or as few channels as are required can be added to the mixer. Do this by just duplicating the input "sections" which are clearly shown on the schematic. One version of this mixer I saw had 25 inputs!
    • A shielded case is probably needed to reduce hum and help stop oscillations.
    • The circuit can be powered by a single 9 volt battery.

    List Component
    R1, R3     : 10K Pot
    R2, R4 : 100K 1/4 W Resistor
    R5 : 6.8K 1/4 W Resistor
    C1, C2, C3 : 0.1uF Capacitor
    Q1 : 2N3819 Junction FET
    Detail download here

    Monday, January 3, 2011

    Audi Carbiolet 1.9 TDI User Manual

    Audi Carbiolet 1.9 TDI User Manual This front mounted intercooler apply for Audi Carbiolet 1.9 TDI User Manual Passat. Tools required : vehicle lift or Jack and axle stands, T25 and T30 Torx drivers, 6mm Allen key or socket, 7mm spanner, 10mm spanner, flat and pozzidrive screwdrivers, hacksaw (blade for cutting aluminium), drill and 6mm drill bit. Large side cutters, craft knife Overalls, safety footwear, latex gloves and safety glasses are also recommended. Follow this manual carefully.

    download : Audi Carbiolet 1.9 TDI User Manual
    Detail download here

    AUDI PERFORMANCE S4/A4 BOOSTGAUGE INSTALLATION

    The APR Boost Gauge utilizes a VDO boost gauge contained in a vent-replacement pod. Designed with Pro-E for the best in fit and finish, giving you a factory like look and feel. The gauge itself is a 52mm mechanical VDO gauge giving very accurate and reliable boost and vacuum readings. The Gauge Pod can be installed in anyone of the three center vents. The installation illustrates a center vent installation.
    download : AUDI PERFORMANCE S4/A4 BOOSTGAUGE INSTALLATION
    Detail download here

    Saturday, January 1, 2011

    Audi S6 Limo Avant Owners Manual

    Audi S6 Limo Avant Owners Manual This front mounted intercooler apply for Audi S6 Limo Avant Passat. Tools required : vehicle lift or Jack and axle stands, T25 and T30 Torx drivers, 6mm Allen key or socket, 7mm spanner, 10mm spanner, flat and pozzidrive screwdrivers, hacksaw (blade for cutting aluminium), drill and 6mm drill bit. Large side cutters, craft knife Overalls, safety footwear, latex gloves and safety glasses are also recommended. Follow this manual carefully.

    download : Audi S6 Limo Avant Owners Manual
    Detail download here

    Audi S4 Limo Avant 2003 Owners Manual

    Audi S4 Limo Avant 2003 Owners Manual This front mounted intercooler apply forAudi S4 Limo Avant 2003 Passat. Tools required : vehicle lift or Jack and axle stands, T25 and T30 Torx drivers, 6mm Allen key or socket, 7mm spanner, 10mm spanner, flat and pozzidrive screwdrivers, hacksaw (blade for cutting aluminium), drill and 6mm drill bit. Large side cutters, craft knife Overalls, safety footwear, latex gloves and safety glasses are also recommended. Follow this manual carefully.

    download : Audi S4 Limo Avant 2003 Owners Manual
    Detail download here