W140 s600 1996 ~ w221 s500 2006 (both japanese specs)
Discussion Starter · #1 ·
In the last 1,5 year my coolant system broke 3 times. 1st time radiator broke, 2nd was the exansion tank broke and last week the heating valve broke. I think there is much pressure inside the cycle but I dont know where. Not head gasket since it is 100,000 km and no overheating history. Any help pls.