PeachParts Mercedes-Benz Forum - View Single Post - 300TD refuses to get too hot

lrg · #14 11-22-2004, 01:43 AM

I think you guys are missing the point here. If he had a problem with his thermostat it would seem it was bad before but has now suddenly fixed itself. A full open thermostat would affect warmup and full open at high heat loads is normal. I've always understood it to be normal for the 617 to see temps up to 100 at hard acceleration on longer grades, I know mine does and has for the 14 years I've owned it. Cooler weather may help keep peak temps down but if you're not getting much of any temp increase then my bet would be on a bad sensor. The gauges usually work or don't work and the accuracy, while it may vary, is unlikely to suddenly change. Try replacing the sensor, it's relatively cheap and easy to do.