Just purchased a nice used 1991 300SE ....
the car seems to run perfect..except the temp guage is always peged at 120c + after running awhile.

I used a thermal gun on the engine to confirm temps when the guage is pegged at 120c...this is what im getting...

Operating abmient temp is 75F ish (socali)
at thermostat housing 225F
at top radiator hose 180F
at bottom radiator hose 165F
at expansion tank 120F

do you guys think i may have a faulty "water-temp-sender"?
Please help.....as i dont want to risk overheat my engine...

Lead
91 300SE