Hoping someone can offer some advice.

Picked up a new Q7 50 TDi last month. The following day, when cold, it hesitated between 1k and 2k revs. It feels like it will stall and then cuts power and comes back. I booked it in for an inspection and was advised there's an outstanding technical bulletin relating to the speed sensor. I've been told I need to sit patiently until Audi resolve it.

The car has since become ridiculous. Pulling out of junctions is dangerous unless you switch to manual and floor it. The car has done 700 miles now.

Does anyone know about the issue, or perhaps can advice about how long Audi usually resolve such issues. I know that may be hard to define, but I mean is it days or months.

I feel like rejecting the car as faulty.

Thanks