Audi A4. Body repair manual - part 78
Headlights, servicing
Notes:
Some procedures could affect the headlight
beam adjustment, requiring that it be reset
Adjusting spray for headlights washer nozzles
2 - Retaining clamps (7x)
To remove, carefully pry out using
screwdriver
To install, press in by hand
3 - Headlight frame
Locked within headlight housing
4 - Seal for lens
Always replace
5 - Reflector
To remove, clip out of retaining rings
To install, carefully press into retaining
rings
Do not touch inside of reflector
Headlights, servicing
6 - High beam bulb
12 V, 55 W (H7)
7 - Front fog light bulb
12 V, 55 W (H1)
8 - Low beam bulb
12 V, 55 W (H7)
9 - Wiring with harness connector
10 - Trim strip
Clipped onto headlight housing
11 - Fixed bearing for reflector
Only on vehicles without headlight
automatic vertical aim control
12 - Cover
Press lock down and remove toward rear
13 - Headlight housing
14 - Bulb socket
15 - Turn signal bulb
12 V, 21 W, orange
16 - Turn signal lens
Headlights, servicing
High intensity gas discharge (Xenon)
headlights, overview
CAUTION!
Disconnect the battery Ground (GND) strap
before working on the electrical system.
Notes:
Before disconnecting the battery, determine the
correct coding for the anti-theft radio.
After reconnecting the battery, check and
activate the vehicle's electrical equipment
(radio, clock, comfort and convenience
features, etc.) as outlined in this Repair Manual
or the Owner's Manual.
Some procedures could affect the headlight
beam adjustment, requiring that it be reset
Adjusting spray for headlights washer nozzles
Headlights, servicing
1 - Housing cover
2 - Xenon bulb
12 V, 35 W
4 - High beam bulb
12 V, 55 W (H7)
V49-
(Xenon)
Headlights, servicing
Headlights, removing and installing
Note:
Protect bumper using cloth backed tape in
headlight area to prevent damage to paint.
Removing
- Remove two bolts (arrows) 6 Nm (53 in. lb).
- Disconnect headlight harness connector.
- Disconnect headlight beam adjusting motor harness connector.
Headlights, servicing
- Pull headlight out from peg mount at side (approx. 15 mm), lift slightly
and then lift out carefully toward front, rotating if necessary.
Installing
- Install in reverse order of removal.
- Always align headlights to adjacent body panels (gap clearances)
before securing.
Headlights, servicing
Headlights, adjusting
Instructions and specifications on headlight
adjustment:
Repair Manual, Maintenance
Notes:
For vehicles with high intensity gas discharge
(Xenon) headlights, the Diagnostic Trouble
Code (DTC) memory must be checked and
erased before each manual adjustment of the
adjusting screws. The basic adjustment is then
carried out. Headlight automatic vertical aim
control On board Diagnostic (OBD), initiating,
Repair Manual, Maintenance
Headlights, servicing
- Change headlight beam adjustment by turning adjusting screws -A-
and/or -B- (use Phillips-head screwdriver or hex-wrench).
The illustration shows the left headlight:
Bosch
A - Lateral adjustment
B - Height adjustment
- Use screwdriver for lateral adjustment -1-.
Note:
The lateral adjustment must be set to "0."
Headlights, servicing
- Checking lateral adjustment
1 - Lateral adjustment indicator
2 - Measuring bubble
Headlights, servicing
Headlight beam adjusting motor (high
intensity gas discharge -Xenon-
headlights), removing and installing
Note:
Always adjust headlights after headlight beam
adjusting motors are removed, installed or
- For right headlight, remove back portion of
intake air duct.
- Remove cover from headlight housing.
- Release headlight beam adjusting motor -1- on right headlight by
rotating clockwise and on left headlight by rotating counterclockwise.
- Release ball joint from its socket by pushing laterally to left on right
headlight and push to right on left headlight.
- Disconnect harness connector -2-.
Installing
- Install in reverse order of removal.
Headlights, servicing
High intensity gas discharge (Xenon)
headlight bulbs, replacing
Replacing Xenon bulb for low beam
Removing
- Remove cover from headlight housing.
WARNING!
HIGH VOLTAGE!
Disconnect the battery Ground (GND) strap
before working on parts of the Xenon
headlight which are labeled with the yellow
high voltage symbol.
Notes:
Before disconnecting the battery, determine the
correct coding for the anti-theft radio.
After reconnecting the battery, check and
activate the vehicle's electrical equipment
(radio, clock, comfort and convenience
features, etc.) as outlined in this Repair Manual
or the Owner's Manual.
Headlights, servicing
- Remove harness connector -1- on Xenon headlight and retaining ring -
2- by rotating counterclockwise.
Installing
- Insert new bulb into housing without touching glass with bare hands.
- Place retaining ring -1- on catches -3- of Xenon lamp -2- with two
recesses (arrows) and secure by turning clockwise.
- Reconnect harness connector and close housing cover.
Headlights, servicing
Replacing high beam bulbs
Removing
- Remove back portion of intake air duct on right
headlight.
- Remove cover from headlight housing.
- Disconnect harness connector -1-.
- Release bulb retaining spring -2- and remove from housing.
Installing
- Insert new bulb into housing without touching glass with bare hands.
- Secure bulb with bulb retaining spring.
- Reconnect harness connector and close housing cover.
- Secure housing cover with bulb retaining spring.