My Audi 2004 is giving me a massive headache right now and can't get any local help. Problems are:

1. Car shutters is low gears at approx 1800-2000rpms
2. Occasionally coolant light comes on and temp gauge rises hot but is not overheating
3. Strange smell coming from car occasionally could be air con gas
4. Just recently all drive lights PRD etc are flashing and car stopped driving or selecting gears
5. Codes were faulty "cam angle sensor" and "fan regulator" which have both been replaced and cost me over $1000 only to find the codes for these faults are still coming up and problem not fixed.
6. Driver elec window switch doesn't always work

Not sure but I have a feeling there is something that may be causing a lot of my problems at the same time and no one can help me.

Please any help would be greatly appreciated!!!