Audi A4: Sound System
- Overview - Sound System
- Component Location Overview - Sound System
- Control Module/Digital Sound System Amplifier, Removing and Installing
- Left and Right Rear Treble Speaker -R14-/-R16-, Removing and Installing
- Front Midrange Speaker, Removing and Installing
- Subwoofer -R211-, Removing and Installing
- Effects Speaker, Removing and Installing
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Overview - Sound System
The following systems are offered:
8RM - Basic sound system.
9VD - Standard sound system.
9VS - Premium sound system, Bang & Olufsen.
8RM - Basic Sound System
One speaker in
Component Location Overview - Sound System
Component Location Overview - Sound System, Speaker, Sedan
1 - Left Front Treble Speaker -R20-/Right Front Treble Speaker -R22-,
8RM, 9VD
- Left Front Midrange Speaker 2
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
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Transmission Fluid Circuit
Overview - Transmission Fluid Circuit
1 - Plug
8 Nm +30º
Replace after removing.
For the ATF check and fill hole
2 - Plug
35 Nm
Replace after removing.
For transmission fluid inspection and fill hole
3 - Transmission Fluid Pump (MTF Pump)
With seal welded
A/C Technology Basic Principles
Physical Principles
The four known states of water also apply to air
conditioning system refrigerants.
1 - Gaseous (invisible)
2 - Vapor
3 - Liquid
4 - Solid
When water is heated in a container (heat absorption), water
vapor can be seen to rise. If the vapo
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