Coolant Leak Due to Cracked/Broken Heater Core Outlet Housing on Mercedes-Benz 500SEL

A cracked or broken heater core outlet housing can cause a coolant leak near the bulkhead (firewall). Our technicians remind us that coolant leaks should be repaired in order to avoid overheating the engine due to coolant loss.

RepairPal Verified
Average mileage: 120,544 (120,544–120,544)
2 model years affected: 1992, 1993
4 people reported this problem
1 person shared problem details
Pulled the 500 out of storage. I have been overseas for nearly two years and it's basically just been sitting in the garage. Started to.slowly consume coolant. Say a quart a day to start then gradually increasing to a gallon after four days.I believe it's h a after core related but was thinking no king a clogged as the water drains out thru overflow when turning engine off. Also my a.c. isn't cold, related or not I don't know. Any guidance is appreciate re existed. I'm going to try and flush the heater core and radiator to see off that helps.
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