Cold outside, car not hot inside...

[trackstar]

Guys, any thoughts? My '96 C280 seems to having a heating problem. When it is cold outside (3O degrees or colder), the cabin inside never gets hot. The temp gauge stays around 80, & even though I have the cabin temp set to its 'hottest' it never gets toasty in there. I have a company car (to lame to mention what it is), and you can fry eggs in there it gets so hot, so I'm thinking there must be a problem. Thermostat maybe?

[Fizzle]

Can you hear the blower fan? Its in/under the passenger side dash. I had the problem your describing. I found that if I was going 55 mph or faster, the cabin would start to warm up because the atmospheric pressure would force the air in.

[stox]

Have you checked your cabin air filter? If it is really dirty, not enough air will flow through.