My wife has a C180 Petrol Estate of 2011 vintage. Over the last few months when starting the car in the morning as soon as the key is turned to start, a continuous moving display of error messages appear. These include 'restraint system inoperative, speedtronic inoperative, abs etc. etc. etc. There must be at least 6 different messages plus all the warning lights stay on. The engine starts fine but sometimes it is impossible to move the selector to drive.
After the car has run for 15 seconds or so the engine fan starts up to maximum speed for some reason. Turn the ignition off and try again and the lights /warnings disappear although this may take a number of attempts. I found there is a supplementary battery under the boot floor (no mention of this in handbook) and suspected it was down and replaced it with a minimal improvement, however the problem returned. I suspect a battery drain but an auto electrician could find nothing. The problem appears worse when left overnight even if this is for a shorter time than leaving it during the day. Outside temperature is almost certainly not a factor.
Driving us mad so any help much appreciated.
After the car has run for 15 seconds or so the engine fan starts up to maximum speed for some reason. Turn the ignition off and try again and the lights /warnings disappear although this may take a number of attempts. I found there is a supplementary battery under the boot floor (no mention of this in handbook) and suspected it was down and replaced it with a minimal improvement, however the problem returned. I suspect a battery drain but an auto electrician could find nothing. The problem appears worse when left overnight even if this is for a shorter time than leaving it during the day. Outside temperature is almost certainly not a factor.
Driving us mad so any help much appreciated.