Hello.
I have the following problem in my A6 2006 model, started this winter when weather temperature went down to around 8C during mornings:
few seconds after I start the engine, I hear 3 beeps and see a warning "breaks!", sometimes I see another warning about ESP fault and parking break malfunction.
Just before the beeps seems like all electricity is restarting, for example radio is turned off and dashboard screen restarting, gas pedal not responding.
After 20-30 seconds the problem repeats itself but after few minutes everything gets back to normal. Seems like if weather is cold, it takes more time to recover.
Problem happens only during mornings. My assumption is that this is due to the cold temperature.
My mechanic replaced the battery but it didn't help and he has no more ideas on what might be the source of this phenomena.
Any ideas?

Thanks!

 

Check the cables leading to your ABS speed sensors on the wheels, along with the brake pad wear sensor cables and see if there is any damage / exposed wires.

 

You need a scanner to read fault codes in the abs module. Without fault codes you diagnosing will be a guessing game.