Hi I recently purchased a 2015 C300h Used Approved from a main dealer some distance from home, the car was delivered/driven home without problem. Since then if I do any distance the Engine Management Light comes on after about 30 Miles with no change in performance, in fact I've just 2000 miles on the Continent with the light on having been promised it was fixed. Thus far it's been to my local MB dealer 3 times and about to go in for the 4th. I've filed a complaint with head office which had little noticeable effect. I've had software updates and 2 sensors replaced and fancy all available avenues have been explored save faulty wiring or sockets, Has anyone else had any problems with sporadic EML messages?