2006 Audi A6 Quattro Q&A

2006 Audi A6 Quattro Question: My temp gauge stop working, is it the thermostat or temp sensor? Can I fix it?

Dealer says its thermostat, but how does it make temp gauge stop working? Where are the thermostat and temp sensor located, can I fix it myself? Thank you -
Answer 1
try www.alldatadiy.com for all that info. i would believe the dealer and you will get a warranty. you can also get a 2nd opinion -