The S

Anybody have diagram of the air suspension system? P&ID?

want

<img src="http://pictureposter.audiworld.com/56080/level_control.jpg">

Pneumatic level control (allroad)
Component locations

1 - Right front air strut
2 - Operating unit
3 - Right rear air strut
4 - Right rear level control system sensor -G77-
5 - Control module
6 - Pressure reservoir
7 - Left rear level control system sensor -G76-
8 - Left rear air strut
9 - Air supply unit with:
Compressor
Vent valve
Lateral check-valves
Temperature sensor
Pressure sensor
Auxiliary noise insulation
10 - Electric/pneumatic lines
11 - Left front air strut
12 - Left front level control system sensor -G78-
13 - Right front level control system sensor -G289-

want

<img src="http://pictureposter.audiworld.com/56080/ar_compressor2.jpg">

<img src="http://pictureposter.audiworld.com/56080/ar_compressor.jpg">

Compressor (allroad)
Component overview

1 - Electrical connection compressor drive
2 - Intake- / exhaust line
3 - air dryer
4 - Level Control Pump Temperature Sensor -G290-
5 - Auxiliary noise insulation
6 - Level Control Pressure Sensor -G291-
7 - Connection suspension strut left front, Color mark: red
8 - Electric motor
9 - Pneumatic vent valve
10 - Solenoid for level control system -N111-
11 - Pressure line, 2 Nm
12 - Pressure connection at compressor, Color mark: black
13 - Compressor
14 - Connection pressure reservoir, Color mark: yellow
15 - Connection suspension strut right rear, Color mark: blue
16 - Connection suspension strut left rear, Color mark: gray
17 - Connection suspension strut right front, Color mark: green

The S

Thanks for both, that helps.

want

Good luck to you.

Ginga52

Anyone knows where to buy a G291 valve unit / block from? Dealer is quoting me almost $600 for one!!! Cheers!

skidmark

Wow, that's an old picture, I remember the "spring thingy" you made to keep the compressor from vibrating on the "psk sway bar". The good old days before h sports. : )

want

Yeah... It's years ago.

allroadSST

Is there a fuse or other relay that controls the 12V DC input to the pump? I just replaced the suspension air pump, but is does not receive any power when the leveling controller is calling for air. I verified that the pump works by running a bypass direct to a battery.
When I bypassed the control circuit, the pump raises the car to the first level, however when the dash light for the air suspension goes to solid, the pump begins to vibbrate violently. This is the same thing that happened prior to replacing the pump. I assummed the pump crankshaft has broken.
Any suggestions would be greatly appreciated.

1FSTWGN

My car is now on ramps. I've got one up on ya. I replaced the pump with the Mercedes $300 version. Still no worky. Replaced the distribution block today. Still no change. What else?