Hello, have a camper with Mercedes 416 CDI engine ( 156 hp – year 2004 – OM 612 engine – 90,000 km – retrofitted particle filter because of green plate ).Now I have for some time the following problem: the car drives about 250 km ( or even less ), then I have – as it feels – no more turbo. It drives, switches also, but turns and turns only and goes hardly forward ( I gondel then with 30 km/h nn mountain up … ) There is no motor lamp and it also does not drive in an emergency program ( as far as I can judge ). If I stop briefly, switch off the engine and then restart after about 20 seconds again the problem is gone … then he runs again “how smeared” …… about 100 or even 200 km or longer …??? A familiar of me has read out the error memory and said something about problems with the underpressure . Unfortunately, is the next 4 weeks on holiday and before I search for everything now as a layman: has already had the same problem before and has had the worst problem for me?