Gregg,

A friend of mine also has a 73 450SL that was running hot (I'm not sure what the temp reading was). He took it to a local shop and they replaced the thermostat, his car did not run hot after that.

Hope this helps.

__________________
Ray
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles