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#1
02-04-2025, 10:39 PM
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E 320 Bluetec Oil Cooler Problem
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 Last edited by nyko46; 02-04-2025 at 10:52 PM. 
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#2
02-05-2025, 09:50 AM
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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
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