My 91 4Matic just had the 4Matic dash light come on. The car has 110K miles. I checked the hydraulic reservoir and OK. Put the control lever in test mode as per the manual. Light is still on as per manual states. Is there any other obvious things to check out? My wiring diagram doesn't help much other than show all the moduals in the system and I don't want to start replacing stuff without knowing what I'm doing. What normally fails on the 4Matic system? Thanks for all input.

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Handyjay

Welcome to the site. Do a search using W124 AND 4matic and reserve some time to look over all the replies you'll get.

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dtf
1994 E320 Wagon (Died @ 308,669 miles)
1995 E300 Diesel (228,000)
1999 E300 Turbodiesel ( died @ 255,000)
2006 Toyota Tundra SR5 AC 4X4 (115,000 miles) rusted frame - sold to chop shop
2011 Audi A4 Avant (165,000 miles) Seized engine - donated to Salvation Army
BMW 330 xi 6 speed manual (175,034 miles)
2014 E350 4Matic Wagon 128,000 miles
2018 Dodge Ram 21,000 miles

I have a '92 4matic parts car, so if you need parts, I will sell them cheap.

System was working properly before flood waters.

Mike

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'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E

Thanks for the offer. I keep you in mind as this develops.

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Handyjay