Please define "overheating" by that I mean what temperature does it stabilize at while driven and what temperture does it go to prior to turning on the heater?

__________________
81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE.