2006 Audi A6 - strange brake light problem.

Grant Lenahan glenahan at vfemail.net
Sun Feb 3 08:37:30 PST 2013

That's the only thing i can think of.  I believe its a hydraulic pressure switch, and it must be actibg up in the cold..... but why?

brake fluid contracts in the cold, so that's not it.  Unless its water-logged and freezing..... You do change/flush your brake fluid every 2-3 years, right?

On Feb 3, 2013, at 11:32 AM, Vic wrote:

> I thought that after 40 years of owning Audis I must have experienced every possible problem that they could throw my way. Guess I was wrong.
> Car is a 2006 A6 3.2 V6 Quattro. Problem started a couple of weeks ago. Every morning when I walked out to my garage I found the car's brake lights were on. They definitely weren't on the previous evenings when I parked the car. Depressing and releasing the brake pedal turned them off.  Figured that the problem may have been caused by the particularly cold weather we were having - and the problem did disappear last week when things warmed up. Unfortunately it reappeared this morning and it wasn't particularly cold.
> Anyone ever experienced this bug? Only thing I can think to do is replace the brake light switch.
> Thanks
> Vic Norman
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