PeachParts Mercedes-Benz Forum - View Single Post - Engine Temperature

2.5Turbo · #5 10-10-2006, 01:21 PM

My 124 300D has a temp switch in the block that only lets the heater blower come on high when the engine has gotten hot enough to allow the heater to blow hot air. Not sure if there is that feature in the 123 though. Using the defroster will override it.

I agree on what's wrong with your stat. Sure sounds like it's stuck open. My 602 usually gets up to temp (~80c) within 2 miles of home with normal driving. On a 2 mile hill-climb floored all the way, you should be a little over 80c if not higher.