On March 2022 I found a oil leak on my 2008 Mercedes Benz E 320 Bluetec
and found it was from the oil cooler inside the V of the engine block.
The car was sent to a certified Mercedes Benz mechanic which had the issued resolved using OEM parts. The mechanic gave me a warranty of 12 Months or 18000 Miles. At the time of the repair the car had 144490 K Miles and now, 02/2025 the car has 155290 K Miles totaling 10800 K Miles after repaired.
As I retired, the car is 95 % of the time on my garage, not in use.
The question is: Is it supposed these oil seal to go bad so quickly (10800 Miles) as happened with mine?
I know that the parts used are OEM parts including a new set of all o-rings to re-assemble all parts taken apart to reach the oil cooler.
Are there any suggestion about this issues?
Thanks

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Nyck - TX - USA

From everything I've ever read on this issue (not having an OM642 myself), this is WAY too early to go bad again....especially if the updated o-rings were used.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 75k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

Whoever did work must have missed something.

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Jim