Thread: 1997 E320 M104 flat at low RPMs, backfiring?
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Old 06-19-2007, 11:45 PM
suginami suginami is offline
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Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
When I first got my W124 E320, I had very similar symptoms.

After my indie replaced both fuel pumps, a mass air meter, and a throttle actuator, he gave up and sent the car to the dealer.

It came back as a bad coil wire connector.

Yes, one bad coil wire connector can cause very bad herky jerky acceleration and backfiring.

There are three of them. I'd replace all three, along with the plugs before I did anything else.
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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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