Replace Belt
1. Serpentine belt 011-997-97-92
2. Belt tensioner 112-200-06-70
My car is a 2004 CLK320 with 160k miles. To save on the labor charges, what else in the "vicinity" should I change?
I never changed the engine mounts and transmission mounts. I checked and I did not see any excessive vibration on the engine.
In the quote, it also mentions this tensioner 000-202-09-19. When I asked the tech, he said "just in case". I would just go ahead to replace it as well.
After I changed these parts, would I feel any difference in the ride or performance of the car?
http://benzbits.com/M112/BeltRouting.pdf
The tensioner pulley is #7, the idler or "guide pulley" is #4.
With the age and mileage of my w209, it is probably wise to change these parts.
What are the symptons of a worn seprentine belt, idler pulley and belt tensioner? I myself did not feel or hear any irregularity, maybe I am used to the car.
Last edited by mis3; Jan 3, 2013 at 11:00 AM.
I do have to find a knowledgeable indie locally. Upon recommendation of a friend, I went to his indie 2 weeks ago to replace my front wheel bearings. The guy installed the seal (ring) the wrong way and I had 3 malfunctions; ABS, BASED and ESP. I did my search in this forum and told the indie to correct it. I did save money but it was a lot of stress.
Last edited by mis3; Jan 4, 2013 at 10:47 PM.
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Cost was $1,144 CAN, including parts, labor, tax and my usual 15% discount.
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My car is well maintained and drives very well. This was just a preventive maintenance because of the high mileage (160k miles).
What should I be looking for after these changes?
As for the price, it was certainly pricey but I do not know of a knowledgeable indie locally. I do have a guy for regular maintenance like oil change, ATF change, brakes, etc. Not sure if I will go to him for engine or other internal works.
Last edited by mis3; Jan 20, 2013 at 12:33 PM.
1. Belt $75
2. Tightener pulley. $52
3. Tensioner. $314
4. Absorber (craftshaft pulley). $462
5. Seal ring. $15
These are Canadian prices. Good that they gave me the 15% discount. I checked the prices from an US dealership, prices were almost the same.
Labor was 2 hours.

I went into the Dyno mode when I started the car this morning. While driving, I could see the voltage fluctuated between 14.3-14.4 V. After I stopped for coffee, the voltage statyed on 14.2 V.
The oil level concerns me. When the car started, it showed 8.6L. Then it dropped to 6.0-6.5L while driving. Is 8.6L too high? The previous oil change was done by an indie, the oil level used to be 7.8 L (at startup).
So, it seems that I was running a bit low for the past few months. It was 7.8L (measured cold) before this oil change.
This is a bit confusing. I read that the oil capacity of my car was 8L so 7.8L seemed to be right. I will watch for malfunction in the next few days.
Last edited by mis3; Jan 21, 2013 at 12:08 PM.
During the slow traffic, I observed the voltage and oil level. The oil level fluctuated between 7.0 to 7.5L and the voltage stayed around 13.8V. When the traffic got better, the voltage went back to 14.2-14.3V.
Hope this is all in specs.



