 My 2012 ML350 ,the car only has 50,560 miles ,more than 6 check in at the service department and today without the Mercedes Benz warranty in force (more than 50,000 miles)the comand system stop working,so by defect the back up camera is not working as well,no radio,no navigator and many more issues.The right side mirror is not folding (3rd time that do that)and  I  have problems with the power lifgate as well(stops in the middle of the opening). I don't remember a day not regreting for the ML350 purchase.Before this car  I  owned a Ford Edge that never went to a mechanic in the 3 years that  I  owned it. They didn't call me from the dealer yet,but for sure the bill will be gigantic.