2006 E320 CDI
Discussion Starter · #1 ·
When it is cold out, my car starts very hard, sometimes taking several tries. When it does start, it runs very rough for a few seconds and emits acrid smoke. The colder it gets, the worse the cold start problem. No codes, though. My mechanic (who replaced all six glows two years ago) finds no codes, and the temperature sensor reads fine. I'm wondering if the problem is the glow plug controller, but wonder if something like that could be faulty and NOT throw a code?