Engine help

[Singh]

Every time I start the car I can feel the engine shaking, not violently but definitely noticeable. Quite embarrassing when passengers point it out. It does it on both petrol and LPG and the rev needle moves up and down just slightly, my old S8 never did this. The revs were always constant and the engine smooth. It only does it for the first 5 mins, after it warms up it is fine. Any ideas what it could be? Ben checked the cambelt the other day at Audi's in the park and said it had been put on wrong, could this contribute to it? I'm starting to feel I am just unlucky when it comes to cars now. If this is going to cost a lot I'm going to go shove it of a f\88in cliff

Vag Com says this:

Address 01: Engine Labels: 4D0-907-560-AVP.lbl
Control Module Part Number: 4D0 907 558 J
Component and/or Version: 4.2L V8/5V G 0004
Software Coding: 05753
Work Shop Code: WSC 00460
Additional Info: WAUZZZ4DZ1N003922 AUZ7Z0Y1489941
4 Faults Found:

17538 - Fuel Trim; Bank 2 (Mult): System too Lean
P1130 - 35-00 - -
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-00 - -
18058 - Powertrain Data Bus: Missing Message from Instrument Cluster
P1650 - 35-10 - - - Intermittent
16955 - Brake Switch (F): Implausible Signal
P0571 - 35-10 - - - Intermittent
Tuesday,10,August,2010,20:57:13:36799
VCDS Version: Release 908.1