Hello, can someone help me, or give me a tip? My old Mercedes 1419 V6 engine OM 401 doesn’t pull at all anymore and I don’t know what that’s all about. In idle, the engine got well on its way, so I think that the diesel supply and the air filter are ok. Strangely enough, it was better after a short break, but soon came back. But could still drive home. Would be very grateful about possible causes of error.