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Old 02-17-2001, 10:25 PM
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I finally decided to tackle the motor mounts on my '86 300E. High miles and vibrations in the wheel/body are the reason. I purchased the mounts at the dealer. After removing the left mount, I noticed the part numbers are different. The part number on the original mounts is 201-240-43-17. The new ones are 124-240-19-17. I realized this 2 hours into the job. Oh, man. This repair seems easy enough on paper and may be if everything falls into place right, but that never seems to happen. Did they sell me the wrong ones? Thanks in advance.


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Old 02-17-2001, 10:45 PM
Dr Parts
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I just looked them up in the parts film and the 2012404317 is optional with the 1242401917 dont worry be happy
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Old 02-17-2001, 11:05 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
From now on, just order the parts from us!

Mercedes does sub up and down numbers like this all of the time.
Donnie Drummonds
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Old 02-17-2001, 11:41 PM
CJ CJ is offline
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It sounds to me like one is for a 201 car and the other is for a 124 car.
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Old 02-22-2001, 12:10 AM
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Thanks for the replies. Just wanted to give a quick update on the new motor mounts. Finished the job on 2/19. It went well. The new mounts were significantly taller than the old ones. The driver's side mount looked very compressed(collapsed?). It was maybe 1/2" to 3/4" shorter than the new one. The right side was about 1/2" shorter. I used the "raise the engine from the oil pan" technique with blocks of wood which made me nervous, but it worked fine. Overall, not a difficult job if everything lines up and comes apart right, but I did swear a few times.

Results? Very nice. Vibrations at idle nearly gone. It also fixed a problem I did not know I had. At engine start-up and shutdown there used to be a rocking of the entire car. This is totally gone. I think I am getting close to that "silky smooth" engine operation. Cap and rotor replacement happens this weekend.

The 300E is growing on me. Perfect car? No. But what other choice is there?

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