Wierd starting problem with me 98 E320. About 25% of the time when I start the car it will fire and turn right off. Sometimes it will do this 2-3 times in a row. But, when it starts it is fine. Has anyone heard of this issue, no "check engine" light. It seems to do it more when the engine is cold than on a warm start. It is a bladeless key car.

Also, there is a low level hum from the engine when accelerating at low rpms. Whats that about? Is that normal?

Thanks

77 450sel-162,000 mi
95 E320 wagon-123,000 mi
98 E320 sedan- 110,000 mi

I'd be suspicious it is a DAS problem caused by an intermittently bad key. Do you have another key you can try using for awhile?
Gilly

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Did not think of that. I will try the spare and report back. Thanks Gilly