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Found it:
Dealer Technical Bulletin 51/00
51/00-2 Groupr 07-All models up to MY (model year) 2000 (except AMG) with ME 2.0 injection system (M112 and M113):
If you receive complaints of rough idle and, or hesitation after cold start, they may be caused by the engine control module (ME-SFI) running very lean after the cold start.
To resolve, please install an updated ME 2.0 engine control module, part number as follows:
Engine M112 (V6): 112 153 0479
Engine M113 (V8) 113 153 0379
(Ok this is an abridged version of the bulletin. It is for the cars with this engine, there is a similar bulletin for the trucks. The dealer should be able to track it down with this info. The part numbers are a bit out of date, I believe they will just need to replace it with the current part number and it'll be fine. For the V6, the newest number, which also is listed as a supercession for the part number given above, is 112 153 22 79, and retails for around a $1000.00. I asked the advisor about warranty for this, he said it would be covered by the Emission Warranty, 8 yr/80,000mi, so maybe you can still get warranty service for it. If you are out of that warranty, probably end up paying for it yourself. There may be some "core value" to the old module, not sure about that though. )
Gilly
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