Finally used my own vag-com and discovered I had a few new errors since the last time I checked. Some I've got an idea where to go to try and fix (at least I hope ), but here is one that I searched for but couldn't find any leads with:

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Address 01: Engine
Control Module Part Number: 4D0 907 559 D
Component and/or Version: 4.2L V8/5V 0003
Software Coding: 05712
Work Shop Code: WSC 00155

17840 - Secondary Air Injection Solenoid Valve (N112): Open Circuit
P1432 - 35-00 - -

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Address 17: Instruments
Control Module Part Number: 4B0 920 933
Component and/or Version: C5-KOMBIINSTR. VDO D09
Software Coding: 01183
Work Shop Code: WSC 00020
Additional Info: XXXXXXXXXXXXXXXXX AUZ7Z0Y1466365

2 Faults Found:
01302 - Control Module for Telematic (J499)
49-00 - No Communications
01311 - Information Data Bus
37-10 - Faulty - Intermittent

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I've got the typical missing lines in my instrument cluster. Does this have something to do with the instrument errors?