Audi A4: Trailer Hitch
Overview - Trailer Hitch

1 -
Information Label
- On the left side of the body at the rear
2 -
Towing Recognition Control Module -J345-
- Removing and installing. Refer to
→ Chapter "Towing Recognition Control Module -J345-, Removing and
Installing".
3 -
Trailer Hitch Release Button -E754-
- Removing and installing. Refer to
→ Electrical Equipment; Rep. Gr.96; Controls; Component Location
Overview - Luggage Compartment Controls.
4 -
Trailer Socket -U10-
- Removing and installing. Refer to
→ Electrical Equipment General Information; Rep. Gr.96; Trailer Hitch.
5 -
Trailer Hitch
- Only removable with the impact member
- Removing and installing. Refer to
→ Chapter "Overview - Impact Member".
Towing Recognition Control Module -J345-, Removing and Installing
Removing
- Open the left service cover. Refer to
→ Body Interior; Rep. Gr.70; Luggage Compartment Trim Panels;
Overview - Luggage Compartment Side Trim Panel.
- Disconnect the connectors -4 through 7-.
- Release the retainers -1- in the
direction of -arrows- and remove
the Towing Recognition Control Module -J345--2-
from the bracket -3-.

Installing
Install in reverse order of removal.
Special Tools
Special tools and workshop equipment
required
- Engine/Gearbox Jack - Gearbox Support -T10337-

- Wedge Set -T10383-
- Wedge 1 -T10383/1-

- Socket - Torx T50 -T10470-


- Double Suction Lifter -VAG1344-

- Wiring Harness Repair Set - Hot Air Blower -VAS1978/14A-

- Angled Screwdriver -VAS6416-

- Engine and Gearbox Jack -VAS6931-


- Trim Removal Wedge -3409-

Revision History
DRUCK NUMBER: A005A014621

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Safety Precautions when Working on Vehicles with Start/Stop System
There is a risk of injury due to the engine starting
unexpectedly.
The engine can start unexpectedly on vehicles with an activated
SEE MORE:
Extraction System Group Classifications
At this time, service units for extracting, cleaning and
filling refrigerant for motor vehicle A/C systems are available
on the market from various manufacturers.
Only certain service stations (with appropriate auxiliary
device and different adapters if nec
Approved Refrigerant Oils and Capacities
Note
As PAG (polyalkylene glycol) oil is highly hygroscopic
(attracts water), opened containers are to be immediately
resealed so as to be air-tight.
PAG oil from containers which have been open for a lengthy
period is no longer usable.
Refrige