Quote:
Originally Posted by greasyv
I have had the same probs with my mb lately and know it's a vac leak but haven't been able to figure out exactly where. Looking through the records of the previous owner they had the same problem twice and both times it was a vac leak in one of the door locks. If you lock your doors before you shut down and it cuts off faster or at all then supposedly it's leaking from one of the door locks???? my 300 td won't shut down at all unless i lock the door a few minutes before shutting down.
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That probably means the leak is in the "unlock" portion of the door lock system (yellow lines with green stripes). When the doors are locked that portion of the system is vented through the "master switch" in the driver's door. When the doors are unlocked, it is part of the vacuum pressure boundary.