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Old 03-07-2002, 05:21 AM
DieselGuy DieselGuy is offline
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Join Date: Feb 2000
Location: Santa Clarita, CA, USA
Posts: 133
BENZMAC - M103 idle drop modification


I read a thread regarding removing the 50 rpm idle drop when the car is put into drive. I believe Benzmac stated it was for '89 and older M103 engines. Supposedly this alleviates some subtle blips in the idle.

I'd like to know how to make the modification to a '87 300E. It idles around 690-700 in park and it drops a bit in drive. Spark plugs, wires, cap and rotor were recently replaced. Injector seals were also replaced to fix vacuum leaks.

Thanks in advance for any help with the modification info.

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