Derek1

I have a 2002 Audi A6 C5. The time in my car is set automatically using either radio or gps I think, but it's always wrong by 1 hour. It wasn't like that before.
Not that long ago time changed into summer time, and the clock in my car adjusted accordingly, but it's still wrong by 1 hour. I can't set it manually as after sometime it changes back.
How do I troubleshoot / fix this?

Harleyguy

Should be able to do a manual rest of the clock. Do you happen to have an owners' manual? When you are performing a manual reset try continuing through the entire menu and see if there is a daylight saving time feature that you can turn off. You might also try a hard reset. Disconnect the battery for several minutes then reconnect. Reset clock as needed and see if it takes. The other thing you might try is set the clock off by the 1 hour error and see if when it self adjusts does it read correctly?

Derek1

Those are all the options that I was able to find. Don't think that there is a daylight saving feature. I do have owners manual, but it's in German, which I don't know. Right now I've adjusted my clock manually by that 1 hour error, it seems like it stayed after I turned off the ignition and then turned it on, but I remember doing it earlier and after sometime it changed back to the wrong time. If and when it changes back to the wrong time I'll try a hard reset which I hope would work, but if not, are there any more suggestions?

Harleyguy

Try setting the clock like so: If it's actually 12 noon and the clock auto-resets forward one hour i.e. 13:00, then try manually setting the clock to 11:00am. Then when it kicks up one hour by itself the clock will read correctly. You obviously have a German model car, yes. You may be able to find an English manual by searching on Ebay. Many words in German are similar to English. EINSTELLEN=enter; STANDHEIZUNG=heat; STANDLUFTING=A/C; ZURUCK=back. You can Google words and get translations. Glock is clock. Scout around and you might find a German speaking person than can help you out.