dacia: I've notice that my 91 300E is also running cool on the highway... 80 degrees, and alittle hotter in the city. I drove back from T.O. last night doing 150Km/h most of the way and I expected the temp to be higher as I've noticed on a number of occasions in the past. (I've had the car for 3 weeks) I attributed the reading to the lower air temp... I think the digital temp display said 3 dergrees. I'm not the least bit worried.
Just my $0.02
Cheers for now.