oil cooler drain clk55 - Mercedes-Benz Forum
 
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post #1 of 4 (permalink) Old 06-18-2019, 07:06 AM Thread Starter
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Date registered: May 2019
Vehicle: 2004 clk55 convertible
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oil cooler drain clk55

Once again, another interesting discovery by new owner of 04 clk55. Just noted the
service reminder sticker someone put on the windshield that states next oil change 45,000
(currently 40,800) and oil type lists 10w-30. I'm changing oil next week on a friends lift
and replacing with Pennzoil 5w-40 euro. I want to get as much 10w-30 out as possible as
I know there is no approved 10w-30 currently 229.5. I see mention of draining the oil cooler
that will hold on to more than a cup. Does anyone drain the cooler and how does one drain it?
Thanks again.
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post #2 of 4 (permalink) Old 06-18-2019, 10:57 AM
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If you warm up the engine, the oil cooler will mostly drain out over an hour or so, as will the oil filter canister. Do not understand why you want to get all the old oil out. Also, I would suggest synthetic oil. I have been using it for many years with no engine issues. Engine runs cleaner and you can extend the time between changes. AND it is good for the environment.
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post #3 of 4 (permalink) Old 06-19-2019, 05:12 AM
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Did you read my post in... Early CLK with no engine oil dipstick ?
Be sure to drain both the front and rear drain plugs,,,allow to drain until dripping almost stops. Fit new crush washers.
I have never heard of anyone draining the oil cooler ...
Just let it drip for a long time ,,,
Then measure out the oil using suitable containers exactly 8.5l or 9 us quarts and fill.
Be sure to use a Mann 718/5x fleece filter or a Hengst. fleece filter .

Last edited by Benzyle; 06-19-2019 at 05:30 AM.
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post #4 of 4 (permalink) Old 06-19-2019, 02:54 PM Thread Starter
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Date registered: May 2019
Vehicle: 2004 clk55 convertible
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Thanks, I haven't read your other post yet but will. I don't actually recall where I read the oil cooler drain; I believe it
was either here or the other mbz blog site. I was reading under an amg post. I do recall reading a post of yours to go a
little light, perhaps 8 or 8 1/2 quarts on fill as easier to top up than try to remove excess. A good idea I will add to my drain.
My bmws also lack a dipstick; I personally disagree for the lack of convenience but I love the cars.
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