It's an older post but might as well reply in case anyone else has this problem. So....
Buy 2 new CR2025 batteries for your key fob & you shouldn't get that message any longer.
It's an older post but might as well reply in case anyone else has this problem. So....I keep getting a "Change Battery" message on my '07 CLS 63 AMG. Battery change doesn't last more than a few days. Anyone else have this problem and if so how did you fix it?
Thank you