I just bought an autoranging multimeter at Sears (a step above Radio Shack) for $49.95 that measures "duty cycles." The Flukes were right next to them, but they were all well over $100. Jim, I know you have to plug the purge valve (Y58/1) line to check Lambda. Is that the valve that's mounted to the left fender well and makes a clicking noise most of the time?

Thanks, Myarmar. Is that a picture of a hot-film type MAF or hot-wire?.

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1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles