Do 280SLs have any unusual overheating issues? I have a '68 280SL - very well tuned and running right, except temp gauge climbs fairly steadily, even in 65-70 degree weather. I am certain that brakes aren't dragging and radiator is clean. Any ideas on things to check or solutions? I am suspicious that the very low mileage of the past 10 years may have lead to corrosion or settleing of sediment in cooling passages - any suggestions for flushing or cleaning cooling system?
Thanks in advance.