Help me. My Audi A6 esp light comes on while braking and then the car dies. When you try to restart it the idle is so irregular it is difficult to keep running. When my car does finally shift into gear it does so with a bang! It feels like the car is about to fall apart. It does this a bout once a month and it is getting scarry Help me... PLEASE!

SOURCE: Audi Quattro A6 will not go into drive

It's the brake pedal switch. There is a switch down on the pedal arm that closes when you press the pedal down, and sends a sensing voltage to the controller, telling it the brakes are applied. This allows the transmission lock to disengage so you can shift out of Park. When that switch fails, the lock won't disengage. You need to replace that switch and you'll be fixed.

SOURCE: 2002 Audi A4 Esp Light comes on, car turns off when I have to sto

I had the same issue with my '05 A4 1.8T.  Turns out it was the RPM sensor.  Audi tried to tell me it was teh fuel pump and the cam-shaft positioning sensor.  Paid for teh fuel pump replacement and it died 6 blocks from the dealership.  Then they replaced the RPM snesor, works great now... Except it's still an Audi.

SOURCE: audi a3 1998 automatic transmission cannot shift into gear

have you checked the brake lights for operation ?
if they don't work than it is your brake light switch located on the pedal support bracket.

SOURCE: How do I change a brake light in an Audi a6?

open car trunk, pull carpet etc back to expose 2-3 plastic wing-nuts that are the backside to backlights

Colin Stickland

• 22516 Answers
• Posted on Aug 16, 2009

SOURCE: audi a6, replacing the front indicator

their is a spring at the back of it which clips behind the headlight