Hi all. I was just about to post a similar question. I recently purchased my first benz a 83 300d and while driving around town in 40 F weather the temp gauge stays between 40 and 80, a few minutes after getting on the highway the gauge reads at 80, then promptly returns to between 40 and eighty after slowing down. heat seems to be the same in town or on the highway, there is heat but never the blasting dry out the eyeballs kind.
thanks,
Gregg