The radiator is cold because the the thermostat is closed and the water is only flowing thru the heater matrix, if you wait long enough (~20mins @ tick over) the stat will begin to open and then the rad will warm up.
Is the heater providing heat? does it cool down if the blower is on full blast?
There have been problems with some water pumps having plastic impellers which break up or fall off the shaft (inside the block, you can't see this), this will cause fairly rapid over heating of the engine when driven.
AIB understand your special Mercedes deserves a special insurance policy. We have a refreshing attitude to insuring high performance, modified, imported or classic and vintage cars and deal with the UK’s leading insurers. We offer discounts for length of ownership, where the vehicle is kept overnight and limiting the mileage and can also cater for those clients who need higher mileage and business use.
To obtain a quotation please call the team on 02380 268351 or visit us atAIB Insurance
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