Hello together, after longer research (also in this forum) I suspect defective injectors as a cause – the car is currently at the Bosch service and I have the fear that they have not listened to me or wanted to listen and first check everything else (and charge) before they do a return test at all. Problem: Half a year ago at -5 degrees did not jump in for the first time. ADAC arrived – with start pilot he jumped directly. Then glow plugs new, battery new, cooling tteltempsensor tested. Then it was everything, but it was never so cold again… Now he did not jump up to 0 degrees in the cold.. still only with start pilot. For 1 year always light sooting at full gas – especially after longer “snow ride”. At cold temp. on the first meters gaaaaanz give light jerking at gaaaanz light gas. Performance otherwise fully there. Diesel filter was replaced – was already overdue – problem still there. A user here in the forum once said that his Mec haniker said that when the rail pressure starts cold, the D5 is less than 200bar, otherwise higher. I followed this “acceptance” and stuck a 800Ohm resistor into the plug from the coolant sensor, i.e. simulated a cooling water temperature of 47°C (according to OBD verified). The engine starts immediately! Is this so that it drives a higher rail pressure directly when the engine is warm? My guess is that it only gets enough fuel to start with a leaky injector. please check the screenshots – especially if the start speed is too low with a cold engine. That’s what the Bosch service wanted to tell me first… Thank you in advance! gruss Axel