Cannot reset clock

[Battleguide]

I've just bought 2006 C180. All fine except that the clock and date are apparently stuck. I can change the date, but it then stays on that date. I cannot change the clock; whenever I try, it reverts to its previous time. It was originally stuck on 9.35; since my garage serviced it it is stuck on 12.32. All other functions appear to work fine. Can anyone help?

 

[mercedes13156]

Are you doing this through the dashboard options? if it gets stuck try resetting the entire car back to the factory settings and start again.

 

[Battleguide]

Yes, through the dashboard. I don't have COMAND. I've tried resetting, but I'm not sure if I am doing it to factory settings. I'll try again. Thanks.

 

[Battleguide]

Resetting to factory settings. That worked. Thank you.