S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

S65 turbo Leak

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Old Feb 9, 2022 | 02:11 PM
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2007 Mercedes S65
S65 turbo Leak

2007 S65 with 75k mileage...Noticed a few coolant drips on garage floor..My indy mechanic says turbos are leaking. In past few weeks I have had to add 2 to 3 ozs of coolant to coolant reservoir each week. There's no smoke from the exhaust and no loss of power. Anyone familiar with this issue? Expense? Overall the car is absolutely mint.

Last edited by S65Bingo; Feb 9, 2022 at 04:10 PM. Reason: Corrected misspell
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Old Feb 10, 2022 | 05:19 AM
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Depends on the weather
Both are leaking? Did he say where exactly the leaks are from?

Reminded me of this leak video
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Old Feb 14, 2022 | 05:48 PM
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'20 S63
Happened on my CL65. Luckily was under warranty as the Dealer bill was around $6000.00
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Old Feb 21, 2022 | 08:14 PM
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'07 S65 AMG
I don't know about coolant, but my S65's turbo sprung a oil leak. Since there is no space around the engine, it meant almost $6000 to get it out and replace a seal that was a few bucks.
I don't want to scare you, but there is a good chance your mechanic will suggest similar approach.
Best of luck to you!


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Old Feb 22, 2022 | 02:37 AM
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MikeS definitely has a great point for saying that an extended warranty is a must for an S Class .
Hoping to be as least expensive as possible
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Old Feb 22, 2022 | 10:57 AM
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2007 Mercedes S65
Originally Posted by WHPH28
Both are leaking? Did he say where exactly the leaks are from?

Reminded me of this leak video
The thinking is leaks could be from the seals on the coolant tubes feeding the turbos. There is no smoky exhaust. I did speak with a company about after market warranty however they said they only look at S65's with 50k or less milage. At 75k they moved on.
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Old Feb 22, 2022 | 10:58 AM
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2007 Mercedes S65
The thinking is leaks could be from the seals on the coolant tubes feeding the turbos. There is no smoky exhaust. I did speak with a company about after market warranty however they said they only look at S65's with 50k or less milage. At 75k they moved on.
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Old Feb 22, 2022 | 11:01 AM
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2007 Mercedes S65
S65 Coolant Leak

The thinking is leaks could be from the seals on the coolant tubes feeding the turbos. There is no smoky exhaust. I did speak with a company about after market warranty however they said they only look at S65's with 50k or less milage. At 75k they moved on.
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