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Old 11-14-2013, 04:59 PM
Jeremy5848's Avatar
Jeremy5848 Jeremy5848 is offline
Registered Biodiesel User
Join Date: Mar 2006
Location: Sonoma Wine Country
Posts: 8,402
High mileage indeed!

Originally Posted by andrewjtx View Post
I'll check mine. I haven't noticed any coolant loss. Possibly only a problem with high-mileage cars?

As I'm fond of posting, my car is only 50k.
You are fortunate to have a "nearly new" Mercedes. As to what causes the crack/leak problem, the answer so far is "we don't know." My personal suspicion is that whoever supplied the plastic to Bosch got the formula wrong on some of them. Most monovalves don't have this problem, especially cars that still have the original monovalve. Maybe Bosch moved the production line to China?


"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
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