Hello I just signed up and would need a piece of advice I have a problem with my old w638 110cdi box 611.980 at 280tkm when I hammer the engine in the cold start it strongly and sometimes dies off even if you admit gas. With further start attempts it starts normally, runs also to a minimal fluctuating empty run quite well and can be rotated in the cold normal up to 3000 1/min clean. externally, nothing abnormal can be recognized by the injectors. the ag r is clean working and is 15tkm old. the chain tensioner is new. the glowing candles all work. air filters and oil service are current. the minimal fluctuating empty run I push a little on the 2 month standing time and on the frosty temperatures at the time. only abnormal is that the clock time in the cluster after 2 days standing time stupid sense shows. but what was also before the error. does anyone have an idea for the rough hammering after the 1st motor start? thanks already for your denkansä tt