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  #1  
Old 11-15-2001, 10:02 PM
Herb Franck
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Angry Surging since new 300E?

Here’s one for you. I have a 1987 300E with 145,000 miles that I have owned for ten years. When the car was almost new, every once in while, usually during the summer, the RPM would surge and the car would buck. This happened maybe once twice a year and then went away. Over the years it began to occur more frequently and today it does it almost every time you run it. One day it will run like a top the next day it will hardly start constantly surges in park, and buck and surges when you drive it regardless of the speed and RPM. Worst of all sometimes in the middle of a turn at an intersection it just dies. It has never however failed to NOT start again??? I have it to four MB dealers all over the country and at least that many Foreign Auto shops and no one can seem to find the problem. We had hoped for a hard failure of some sort but no luck. I spoke with the original owner and explained the problem and he told me when the car was brand new it did this a couple of times. Anyone have any ideas? On the days it runs, the engine purrs like a brand new car.
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Old 11-15-2001, 11:33 PM
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Join Date: Nov 2000
Location: Los Angeles, CA/ Hilo, HI
Posts: 92
Did you have the o2 sensor and the injection computer checked?
My 88 did something similar and it turned out to be the O2 sensor and the fuel pressure regulator.
Best of luck!
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81 300 SD grey/palomino 168K miles
84 190E 2.3 black/grey 64K miles (wrecked)
85 190E 2.3 maroon/palomino 92K miles
88 300E desert red/palomino 204k miles
(made to look like a '94-95)
92 400E desert taupe/creme beige 120K miles
(converted to 94-95 E420 looks)
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  #3  
Old 11-16-2001, 12:11 PM
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Join Date: Apr 2001
Location: Dallas/Fort-Worth
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I am dealing with my W124 surging as well...does it mostly in reverse, and sometimes in drive, but never in park. And that too, is intermittent...I can go for days without surging and then like a demonic possession, the surging comes back!

The stalling when turning though, I think is a different problem. That happened to me, (especially with the A/C on) and it turned out to be the OVP.
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