Losing small amounts of coolant? This may be the problem.
This fits all 201 chassis 190E and 190D from 1984 to 1993 and all 124 chassis sedans, coupes and wagons from 1986 to 1995 both gas and diesel. Visually check the condition of the seal on the underside of the cap. If it is cracked, hardened, or bably worn, you should replace it.
W201 W124 Coolant Reservoir Pressure Cap
$12.90
SKU:
GEG-124COOLANTCAP 
Product Details
