I have an Audi A6 1.9Tdi automatic and have a problem with vibration on the vehicle, you can feel the vibration through the seat more than the steering.

I have fitted 4 new tyres, had all wheels balanced, had new C.V joints and C.V gaiters and am somewhat of a loss as to why the I can feel this vibration.

I have also have a problem that when I reverse out of the driveway and then engage forward gear sometimes the engine stalls which I find surprising on an automatic gearbox.
Someone has suggested it could be a problem with the gearbox imput shaft.

If anyone has any solution as to what the problem may be I would be very grateful to hear it.