I have a 1985 380SL with 110K miles. Last night we had very dense fog in our area. After stopping for stoplights the car would stumble and die and then restart OK until the next stoplight (has never done that before).

It also has not been cold starting very well, it cranks longer than usual, starts then dies when attempting to pull out, after running for 30-45 seconds it behaves Ok after cold start. Recently replaced fuel filter, cold start fuel enrichener, glove box fuel pump relay and spark plug wires. Does this sound like a bad fuel pump or what? Also maybe condensation in the distributor cap (thinking this as I write)?

Please help with ideas.

Thank you.

That sounds exactly like my BMW 320i when it developed a couple major vacuum leaks that got worse after a cold snap. I think the cold weather made the already failing front crank seal and something on the air intake contract enough to get blown out or sucked in.

My mechanic fixed both for under $200.

So perhaps consider a vacuum leak the problem?

-Aaron