Check for coolant smell in the cabin floor, check for possible white streaks below hoses, water pump, etc. These should be obvious places. Intake manifold leak is a bit harder to find and nastier, too. Any white smoke from the exhaust? How quickly does the coolant disappear?
Drove about 20 miles today a couple of runs locally,no fast roads.Tonight I added half a litre-16fl oz ,a quart??
My SA called-said not to worry-as the car is almost 4 years old it will use more oil and water .....I have NEVER seen the water light on in 10 years of owning SLKs.
Time for a new dealer??
Apparently it should be half full,which it was,but I brimmed it! Will recheck daily.
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