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Old 08-06-2003, 08:16 PM
rrobben rrobben is offline
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Join Date: Jul 2003
Location: Louisville, KY
Posts: 41
Another 140 with no heat


I have a 93 500SEL that has a problem with the heat. I get a slight blowing of air (with fan on MAX) from the front vents, both center and sides. However, with the temp selectors both on HI I still get no heat. I've found that if I depress the red "booster" in the center, I can get some heat. It's not the kind you could cook a hotdog over, but it would do. In the rear, I get nothing but cold air no matter I do up front.

I found this old thread No Heat - W140 , but there is never really an answer. I've just flushed and filled the radiator with MB coolant, and replaced the tstat. I also tried the diags test JimF mentions on his site, but I too could only get the sensor values to come up. It's warm here now, so it's no big deal. You'll get a kick out of how I found out I had no heat. I was driving home one particularly hot afternoon when my engin temp guage started to read around 105, so I thought I'd turn the heat on to vent it a bit. Ha! Foiled again!

I'd rather not dump yet another $500.00 into this thing right now, if you know what I mean. If I show up at the inde shop again they are going to give me my own locker!

Thanks all!
1993 500 SEL 121,000
2003 Toyota 4Runner 4X4 Limited (Sweet!)
1995 Ford Bronco 351 Windsor 135K miles (Hunting truck)

Past Vehicles
1999 Landrover Discovery II 46,000 (Sold)
1998 Lexus ES300 (Sold to get my Benz)
1973 Chevy Nova SS (drove it till the body fell apart in '87)
1971 Chevy Camaro (wrecked in high school)

Last edited by rrobben; 08-07-2003 at 09:52 PM.
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