zbenz,

my car is a '85 300CD but I believe the engines are essentially the same.

nothing problematic to doing this. make sure the thermostat faces the right way. be careful to get gasket in correctly.

different thermostats apparently can result in different operating tempatures. I read that some people change them more than once using different brands because they don't like the tempature. I bought mine from fastlane (here) and have no complaints.

Also, every time I mess with my radiator the car's tempature acts weird for a while when I restart. Must be air in the line (at the thermostat?). Can get pretty hot before settling down. I don't know how to prevent this. Just keep an eye on it at first.

Nic