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Question Regarding Transmission Fluid replacement, spark plugs, fuel filter, etc etc

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Old Feb 23, 2011 | 06:18 PM
  #1  
illery's Avatar
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CLK 320
Exclamation Question Regarding Transmission Fluid replacement, spark plugs, fuel filter, etc etc

Guys Ive been searching but still have not found a definitive answer, so thought I would turn to my MB world in regards to the servicing schedule of the vehicle. I purchased mine used and don't have the service book, I bought it almost brand new with very low mileage, had the vehicle for a few years now and it has been more or less just oil changes up until now. Car is currently at 66000 KMS, it has been very rarely used for the past couple of years due to me taking the public transit to work.

So my question is, when should I replace the transmission fluid? I asked a few advisors at the dealership and they say it is "lifetime". While researching online I have found that we should still get it changed, my question is when would be a good time to do this?

the car is an 04.

Also, same question for spark plugs, fuel filter and rear differential oil, when should all these be replaced, whats the general guideline, when did you change yours on your CLK ???
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Old Feb 23, 2011 | 06:37 PM
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2005 CLK 500 Coupe
I just did it in a dealership, I ask the advisor how often I should do it, and he said just once.
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Old Feb 23, 2011 | 07:06 PM
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From: Jerzy
04 CLK 320 > CLK32K
Originally Posted by zdfun
I just did it in a dealership, I ask the advisor how often I should do it, and he said just once.

Do what once? Everything on that list?



Tranny fluid should be replaced every 40k miles. I bought my car with 55k miles and now have 70k. I have already changed everything you mentioned and also added some Magnecor plug wires.

Last edited by dynomite05; Feb 23, 2011 at 07:14 PM.
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Old Feb 23, 2011 | 08:48 PM
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CLK 320
Hi Wes. So you got your rear differential fluid changed as well? *Also, in terms of transmission oil change: did you notice any difference in the smoothness of the vehicle?

I just read that some earlier clks were plagued with the radiator fluid leaking into the transmission, *are you aware of this issue? That just really terrifies me. Some have gone as far as replacing the entire radiator just to play it safe.

Anyone face any issues???
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Old Feb 23, 2011 | 08:51 PM
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2005 CLK 500 Coupe
I mean the transmission service.
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Old Feb 23, 2011 | 09:09 PM
  #6  
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From: Jerzy
04 CLK 320 > CLK32K
Originally Posted by illery
Hi Wes. So you got your rear differential fluid changed as well? *Also, in terms of transmission oil change: did you notice any difference in the smoothness of the vehicle?

I just read that some earlier clks were plagued with the radiator fluid leaking into the transmission, *are you aware of this issue? That just really terrifies me. Some have gone as far as replacing the entire radiator just to play it safe.

Anyone face any issues???

Yea, I changed the rear diff fluid. Definitely felt a difference after the tranny oil change.

You're talking about the glycol contamination. It was the Valeo rads that had the issue and they were usually replaced with the Behr rads. That was the first thing I had checked when I bought the car. The Behr rad is a good indicator you're in the clear.
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Old Feb 23, 2011 | 09:19 PM
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CLK 320
Originally Posted by dynomite05
Yea, I changed the rear diff fluid. Definitely felt a difference after the tranny oil change.

You're talking about the glycol contamination. It was the Valeo rads that had the issue and they were usually replaced with the Behr rads. That was the first thing I had checked when I bought the car. The Behr rad is a good indicator you're in the clear.


So you have the behr rad? Any quick way to check... I have a feeling mine has the valeo rad since my vehicle was an earlier production.

Would you recommend changing it if I have the valeo rad?
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Old Feb 23, 2011 | 09:26 PM
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From: Jerzy
04 CLK 320 > CLK32K
Originally Posted by illery
So you have the behr rad? Any quick way to check... I have a feeling mine has the valeo rad since my vehicle was an earlier production.

Would you recommend changing it if I have the valeo rad?

I have the Behr rad. You could check the rad for the brand, but I forgot the exact place. I would take it in to be checked along with the tranny. A reputable shop should know about the issue and what to check for. Do a search on glyco.
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Old Feb 23, 2011 | 10:03 PM
  #9  
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CLK 320
Will do. Thanks again and again!!! You know everything about the w209s. Haha
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Old Feb 24, 2011 | 05:13 PM
  #10  
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Anyone know the part number for the tranny and diff fluids for an 04 clk 500?
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Old Jul 20, 2012 | 04:57 PM
  #11  
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n/A
Tranny Flush

I have replaced my radiator about a year ago and it fixed the shuttering issue I was having with my transmission. The issue is back and now worse. I was going through my old paperwork to see what was done besides replacing the radiator and I did not see that the transmission was flushed.
My question is if I do a transmission flush, is it possible that the issue will be resolved even temporarily or am I looking at rebuilding my tranny?

Any advice or experience would be beneficial.

Thanks
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Old Jul 20, 2012 | 11:00 PM
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It's hard to say, but if your transmission has more than 39K on it without a fluid and filter change - DO IT!
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