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#1
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1993 300E 3.2 vibration at idle
After driving my 93 300E 3.2 ten miles or so when I stop at a traffic light I feel vibration coming from the engine. If I turn off the engine and restart the vibration goes away. It feels like if a spark plug is not working. I changed the spark plugs but it did not help.
I also checked all the vacuum hoses, but did not find any problems. Any suggestions. |
#2
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On many of my cars, when I felt a vibration coming from the engine, it was worn out motor mounts.
If you had a spark plug not firing correctly, you would have more than a vibration problem, but more of a strong shaking.
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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". |
#3
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You may want to change the resistor boots under the 3 coils,
Common faulty part on 104s. |
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I had the same problem with my C280 (same M104 motor).
One (or more) of the cylinders is mifiring bad enough, so that it shuts down, preventing damage to the catalytic converter (unburned fuel in CC will ruin it). I had the spark plugs (Copper, NOT Plat.), plug wires, and coil ends (X3 of them.. 2/cylinder) per Arthur's suggestion. Car has run like a dream since then! Good luck!
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2006 E350 w/ 155k miles (Daily Driver) Previous: 1993 300E 3.2L Sedan w/ close to about 300k miles 2003 E500 Brilliant Silver (Had 217k miles when totalled!) 1989 300E with 289,000 miles (had for <1 yr while in HI) 03 CLK 500 cabrio (Mom's) 2006 C230k (Dad's) 1999 S420 (Mom's/Dad's) 2000 C230k Sport sedans 2001 CLK320 Cabrio (Mom's) 1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!) |
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