Audi A4: Seat Belt Latch, Function Test
Seat Belt Latch, Checking
- Insert the belt tongue into the seat belt latch until it clicks
into place. Check whether the locking mechanism is properly
engaged by giving the seat belt webbing a firm jerk.
- Replace the entire seat belt with the seat belt latch if the
belt tongue fails even once to engage properly in the seat belt
latch during at least five tests.
Release, Checking
- Press the seat belt latch with finger pressure to release the
seat belt. With the seat belt webbing relaxed, the belt tongue
must spring out of the seat belt latch without assistance.
- Perform the test at least five times. Replace the entire seat
belt with the seat belt latch if the belt tongue fails to spring
out even once.
WARNING
Under no circumstances may lubricant be used to
eliminate noise or stiffness at the seat belt latch
buttons.
Seat Belt Relays and Belt Tongue, Checking
The plastic-covered guides show fine parallel grooves after
straining of the belt system (belt was fastened during
accident). (Wear from frequent belt use can be identified by
smooth signs of wear that are free of scoring.)
- Check plastic for deformation, rupture and the formation of
cracks.
- For groove build-up and/or damage, replace the entire seat belt
with the seat belt latch.
Fasteners and Mounting Points, Checking After a Collision
- Seat belt latch tongue deformed (fully extended).
- Height adjustment not functional.
- Mounting points (seat, pillar, vehicle floor) distorted or
threads damaged.
- If damage is found on the components, replace the entire seat
belt with the seat belt latch.
- If parts of the seat belt system are removed due to an accident,
replace the belt system bolts.
- Replace the mounting points.
Note
If damage is discovered that did not result from an accident,
For example wear, replace only the particular part which is
damaged.
Seat Belt for Child Seat, Checking Child Seat Restraint Function,
Market-Specific, Not for Driver Seat Belt
To check the function, the entire belt system must be installed,
including the side trim panel.
Hold Function, Switching On
- Pull out the seat belt all the way.
Proper Function
- The belt must retract with a chattering sound.
- If the retracting process is stopped, the belt cannot be pulled
out anymore.
Switching Off
- Belt retraction to about 100 mm (3.93 in.) remaining.
- Hold function must switch off with a remainder of 100 mm (3.93
in.), at the latest. The belt functions normally again.
If the seat belt for the child seat restraint function does not
work, replace the seat belt
Child Seat Anchors, Checking After Collision
Inspection Points
- Child seat anchors must be checked for damage or deformation after a
collision.
- Child seat anchors welded or bolted into the body or the seat or
backrest must not be repaired or straightened.
- Child seat anchors bolted into the body, seat or backrest must
be replaced if damaged or deformed.
- The bolts used to secure the child seat anchors must be replaced
if the bracket is damaged.
Safety Precautions, Automatic Dimming Interior Rearview Mirror
WARNING
Health risk due to electrolyte.
- To produce its unique properties, the interior rearview
mirror glass is composed of several layers and contains
an electrolyte. Be careful of electrolyte fluid leaking
from a broken mirror.
- The electrolyte fluid can cause irritation to the skin,
eyes and respiratory system.
- If electrolyte fluid comes into contact with the eyes or
skin, flush thoroughly with plenty of water. If
irritation persists, seek medical attention immediately.
Caution
Electrolyte fluid leaking from a broken mirror will
damage all plastic surfaces it comes in contact with.
Remove spilled electrolyte immediately using clean water
and a sponge.
Repair Information
Contact Corrosion
Contact corrosion can occur if incorrect fasteners (bolts, nuts,
washers, etc.) are used.
For this reason, only fasteners with a special surface coating
are installed.
Rubber or plastic parts and adhesives are also made of
non-conductive materials.
If there are any doubts as to whether parts can be reused or
not, use new parts. Refer to the Parts Catalog.
Note
- The use of original replacement parts is recommended, since they
are tested and are compatible with aluminum.
- The use of Audi accessories is recommended.
- Contact corrosion damage is not covered under warranty!
Line Routing and Securing
When loosening or removing and installing hydraulic, pneumatic lines or
wires, draw sketches or take pictures. This ensures installation is the same as
the original.
READ NEXT:
Component Location Overview - Storage Compartment and Covers
Component Location Overview - Storage Compartment and Covers
Note
The Avant is shown.
1 - Luggage Compartment Roll Cover
Removing
- Remove the driver side instrument panel side cover. Refer to
→ Chapter "Instrument Panel Side Cover, Removing and Installing".
- Equipped on some models: Open the storage c
SEE MORE:
Component Location Overview - Airbag System
1 - Pedestrian Protection Trigger 2 -G599-
Overview. Refer to
→ Chapter "Overview - Pedestrian Protection".
2 - Front Passenger Airbag Deactivation Key Switch -E224-
Not for NAR
3 - Front Passenger Airbag
With
Special tools and workshop equipment required
Torque Wrench 1332 40-200Nm -VAG1332-
Engine and Gearbox Jack -VAS6931-
Engine/Gearbox Jack Adapter - Wheel Hub Support -T10149-
Caution
This procedure contains mandatory replaceable parts.
Refer to component overview and parts catalog pri