Steve Brotherton might have been referring to either the M103 3.0 liter engine, or the early 3.0 liter M104 engine with the mechanic fuel injection.

Your M104 engine has the HFM-SFI fuel injection system (hot-film mass air flow sensor), with integrated electronic ignition and sequential fuel injection. This system combines fuel injection and ignition control in one module.

HFM fuel injection systems are designed so that idle speed can't be adjusted. Idle speed is completely controlled electronically.

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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".