My blower motor just went out yesterday. I removed the motor to find the wire going to the + brush had been contacting the commutator and burned through. That explained why it was running slow and stopped randomliy. Is there a cheap way to fix this or do I trade it in for a rebuilt motor?

Repairing the wire should be pretty simple, but if the brushes are worn out or the commutator surface is grooved and tracked it may be worthwhile buying a replacement. To replace the wire, just splice in a new piece and cover the whole area with electrical tape. If you can solder, solder the splice ends, then cover with electrical tape. Good luck, Jim

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Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

The commutator has a VERY deep groove in it. (I guess 21 years of running will do that). What does a rebuild usually go for?