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Old 08-30-1999, 11:29 PM
Benzmac Benzmac is offline
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
This mod was not for your car and Mercedes came out with a bulletin telling techs to take out the resistor when the idle modification was done. There is a mod for the 89 and older 103 engine cars where the 50 rpm drop when in gear is elliminated. Your car may have other problems such as bad engine mounts or fualty injectors, but I do not think there are any real mods for the 91.

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