24.1. Details of the air suspension air circuit:
1 - Front right shock absorber;
2 - Green air tube, from the solenoid valve block to the shock absorber 1;
3 - Yellow air tube, from the solenoid valve block to the shock absorber 4;
4 - Rear right shock absorber;
5 - Red air tube, from the solenoid valve block to the shock absorber 7;
6 - Receiver in the luggage compartment;
7 - Rear left shock absorber;
8 - Pipe connection, under the rear left seat;
9 - Blue air tube, from the solenoid valve block to the receiver 6;
10 - Receiver on the bottom, front left;
11 - Purple air tube, from the solenoid valve block to the shock absorber 12;
12 - Front left shock absorber;
13 - Black air tube, from the air supply unit to the solenoid valve block;
14 - Air supply unit with a block of electromagnetic valves, on the bottom, front right.
2. The location of the tubes on the solenoid valve block is shown in the illustration.
24.2. Connection points of tubes on the solenoid valve block:
1 - Black, between the air supply unit and the solenoid valve block (internal);
2 - Green, to the front right shock absorber;
3 - Red, to the rear left shock absorber;
4 - Purple, to the front left shock absorber;
5 - Blue, to the receivers;
6 - Yellow, to the rear right shock absorber.
3. The details of fastening the air supply unit with the solenoid valve block are shown in the illustration.
24.3. Installation details of the air supply unit with the solenoid valve block:
1 - Air intake with filter;
2 - Air intake tube;
3, 22, 24 - Bolt, 20 Nm;
4 - Bracket;
5, 28 - Rubber support, replaced as an assembly;
6 - Air supply unit, upper part;
7 - Air tube;
8, 18, 20 - Bolt, subject to replacement, 5 Nm;
9 - Solenoid valve block, to replace, remove the air supply unit;
10, 17 - Connection, 3 Nm;
11 - O-ring, must be replaced;
12 - Piston ring;
13 - Rubber support;
14 - Bolt, 9 Nm;
15 - Bracket;
16 - Bolt, 4 Nm;
19, 21 - Nut, 9 Nm;
23 - Bracket for the air supply unit and block 9;
25 - Retainer;
26 - Wiring harness with air suspension compressor temperature sensor;
27 - Air supply unit, lower part.
(The original article is located on the online resource: audimanual)