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Old 09-07-2003, 02:18 AM
Registered User
Join Date: Sep 2003
Location: Miami, FL
Posts: 181
380 SEL (Euro) Shaking and hesitating

My 83 380 sel has had these symptoms for a while when the car is on Neutral , Park and stopped in traffic (Drive). You sometimes can see and feel the car shake. In stop and go traffic, I sometimes feel the car hesitate, but then drives fine after a few secs, in highway traffic, car drives like a charm.The firing is also up, down, up down, up down, (in other words it doesn't sound like it is firing right.) The car has had the fuel pump changed, by a the Merc Dealer. I just last week changed the Cap and Rotor, and the Ign Wires. I had changed the plugs about 20000 miles ago to Platinum 4's ( which I am kind of not sure about now after reading a few posts). yerterday I noticed, a really small rattling noise , which I believe me may be linked. And to top it off I failed emissions when I took for the 2 year New Jersey Inspection. Somebody!! Anybody help!! I love this car too much, it has the nice one piece Euro lights, the shorter bumpers, you know it is a Euro. Oh Ya and it has no oxygen sensor, I checked that already.

**A few Hondas etc... etc... Not Worth Mentioning**
83 Euro W126 380 sel Money Pit (Sold)
91 W124 300e 2.6. (Sold) 3.0 Motor is Much better!!
93 BMW E34 Touring Wagon (Sold) Sweet Car!!
91 300e (Just 200k with Ease.)Best car ever ???(Sold)
90 420sel (Black with Tan Interior) Best car ever!!!!!!!

Last edited by Theurig; 09-07-2003 at 02:24 AM.
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Old 09-08-2003, 07:57 AM
Super Moderator
Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
There are a number of things that can cause this:

- vacuum leaks around the injectors, vacuum lines and intake manifold
- one or more bad injectors
- bad idle control module
- leaks in the idle air lines
- bad idle valve

Try a search - lots of posts on this problem. Sounds like you need a good shop with experience with these cars.

Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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