It is 115 degrees here in Phoenix today. My 1981 240D, with the AC on stayed at a constant 110 degrees C driving on the freeway at 65 mph.

Is this safe? Will running this hot cause any damage? When it is cooler outside, it will stay closer to 100 degrees, and on a nice day (when I do not have to use AC) it will stay around 90 degrees.

I dont know if this is normal becuase of such hot outdoor temps, or is this a serious issue that I need to start troubleshooting.

Thanks for any suggestions as always!