My 07 D5 was also running rough for the first few seconds in the winter after first start of the day. Even after short trip, the rest of starts were normal. Doesn't really do it now as the weather got warm. Could it be glow plugs although there's no codes and resistance are all the same and below 1 Ohm? Guess they are still the original though, could they be weak nonetheless? Or injectors are a more probable cause? They are original too. Car has 190k miles on it. Thanks for advice.
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