Audi A4: Control Module/Digital Sound System Amplifier, Removing and Installing
Special tools and workshop equipment required
- Fiber-Optic Repair Set - Connector Protective Caps
-VAS6223/9-.
The Digital Sound System Control Module -J525--1-
is located behind the left luggage compartment side trim panel.
Note
If replacing the control module, select the "Replace control
module" function for the corresponding control module on the
Vehicle Diagnostic Tester.
Removing
- Turn off the ignition and all electrical equipment and
remove the ignition key.
- Open the left storage compartment in the luggage
compartment.
The bracket with the Digital Sound System Control Module
-J525- must be removed first.

- Release and disconnect the connectors
-1- from the Digital Sound System Control Module -J525--2-.

- Insert the Fiber-Optic Repair Set - Connector Protective
Caps -VAS6223/9--1- onto the MOST
Bus connector -2-.

- Remove the nuts -arrows- on the
bracket and remove the Digital Sound System Control Module
-J525--2- with the bracket.

- Remove the bolts -arrows- and
remove the Digital Sound System Control Module -J525--1-
from the bracket -2-.

Installing
- Install in reverse order of removal. Note the following:
Tightening Specifications
- Refer to
→ Chapter "Component Location Overview - Sound System, Speaker, Sedan"
- Refer to
→ Chapter "Component Location Overview - Sound System, Speaker, Avant"
READ NEXT:
The Left Rear Treble Speaker -R14-/Right Rear Treble Speaker
-R16--1- are inside the rear doors
at the top.
Removing and installing is identical.
Removing
- Turn off the ignition and all electr
The Left Front Midrange Speaker -R103-/Right Front Midrange
Speaker -R104--1- are located in
the center of the front doors.
Removing and installing is identical.
Removing
- Turn off the ignitio
Subwoofer -R211-, Removing and Installing, Sedan
The Subwoofer -R211- is located in the rear shelf.
Removing
- Turn off the ignition and all electrical equipment and
remove the ignition key.
-&n
SEE MORE:
Overview - Selector Mechanism
Selector Mechanism in the Vehicle Interior
1 - Selector Mechanism
With the following integrated components:
Selector Lever -E313-
Selector Lever Position Sensor -G727-
Transverse Selector Lever Lock Sensor -G868-
Selector Lever Sensor System Control M
Fig. 6 Center display: adjusting the display
Switching the view
Applies to: Audi virtual cockpit
Press the VIEW button to switch between the
default view (1) and the enhanced view (2).
Adjusting the layout
Applies to: Audi virtual cockpit
Depending on the vehicle equipment, various layouts
may