Hi, I'm new to this forum. I have an audi a4 b9 avant 2.0tdi s line. I have had a brake servo restricted please return to workshop message appear on dashboard along with start stop not working please return to workshop. This has been intermittent over last week. When the messages appear the brakes feel funny. I don't think it is an actual brake servo fault as I have done the brake pump test. Possible sensor issue? Bit strange for a car less than 2 year old with low miles. Any ideas anyone?
Hi, I currently have an a4 b9 avant with same issue. What was the outcome of your issue?