O relé do compressor é debaixo do volante.
Então deve ser mesmo curto-circuito nas fichas do compressor.
A nível de erros, deu-me o seguinte:
Tuesday,25,January,2011,13:18:45:46862
VCDS Version: Release 10.6.0
Address 34: Level Control Labels: 4Z7-907-553.lbl
Control Module Part Number: 4Z7 907 553 E
Component and/or Version: - 2C1A1 D040
Software Coding: 25500
Work Shop Code: WSC 09999
VCID: 4796594209F7E224
2 Faults Found
01400 - Suspension Level Control
11-10 - Control Limit Not Reached - Intermittent
01772 - Signal from Level Control Pressure Sensor (G291)
27-10 - Implausible Signal - Intermittent