what model, engine, age, and mileage?
it's impossible to answer without that sort of information
otherwise, it could be an enormous multitude of reasons
runs rich getting to much gas.check the choke if carburated if FI check fuel pressure
Possibly bad glow plugs.
Sure, the smoker blows smoke into the face of the second-hand smoker who inhales and runs from the room and exhales the smoke into another person's face. That person would be the 3rd hand smoker. Not too likely.
see if blows white smoke and look at spark plugs its most likely head gasket out of intake leak
The 2012 Mercedes-Benz Sprinter runs on diesel.
The 2010 Mercedes-Benz Sprinter runs on diesel.
The 2014 Mercedes-Benz Sprinter runs on diesel.
It probably need a top end rebuild. I just downloaded a service manual for my 2000 king quad 300 and followed it step by step. I had the cylinder bored .40 over and ordered a piston kit/top end gasket kit and I did all of the assembly myself. After everything it cost me $200 and 1 week of time. Now it runs great. Good luck
change fuel filter
The 2013 Mercedes-Benz Sprinter runs on diesel fuel.
The 2011 Mercedes-Benz Sprinter runs on diesel fuel.
sounds like you might have an injector that is constantly firing causing a flooded fuel system, however it could also be your injector timing through your ECU.