Deanyal,

I had the same codes (10 on the DM/4 on the LH-SFI) on my 94 E500 although it didn't have the symptoms you described as my car idled and ran fine. I also replaced the MAF but the CEL came back (same codes) only after a few weeks. As of now, these are the only codes stored and nothing else on the other modules. I'm leaning towards replacing the wiring harness but that was just replaced at 43k miles (under MB goodwill) according to the VMI and the car currently only has 76k right now. I don't know if I should take the plunge as the harness is almost 500.- or should I check for anything else? As you know, code 4 indicate high or low voltage at MAF or short circuit? Would a bad O2 sensor cause this problem too as old sensors tend to give lean readings and the LH-SFI, trying to richen the mixture is probably operating above it's normal range thus causing high/low volatage? Any other ideas. Thanks.

WDV