todd5854

Hello all.

I have a 2001 CLK55. Today I was told by my Mercedes Benz mechanic that the W209 mounts would be a much better fit for the car, than the fluid-filled W208 mounts. Apparently they last longer, are more responsive to acceleration. And smoother. (I will be modifying my engine lightly in the future, if this makes a difference.)

After researching his statement, I agree that it seems the W209 mounts are better, but he then told me there are multiple part numbers for the engine and trans mounts, as well as different W209 mounts for different years.

Which year or part number W209 mounts do I want? I will also need my transmission mount(s) replaced. Thank you.

Thank you all for the insight.

insame1

I could be wrong here but I don't think there is a difference in fit as long as you get them for a v8. The trans mount could be different on the later w209's with the 7 speed 722.9.

KJI3jflarryfe93

i have w211 e55 amg kompressor engine mounts on my c43.
car is more stiffer now, engine is less flexing

Ausmbtech

I'm using the same. Use the W211 55K mounts, they last longer, the engine rocks less and they fit perfectly.

KJI3jflarryfe93

when the engine vibrates less, would you say plastic bits and maybe other parts will break easier when the engine has less vibration using W211 E55AMG kompressor engine mounts?

all stiff is not good for any car, there has to be some vibrations for parts not to break?
a few years ago i bought for my c43 koni adjustable shox, they are set on FULL stiffness and i also have vogtland lowering springs, car is very stiff now, then i put the new w211 e55 engine mounts which are stiffer than c43 engine mounts, would this cause any failiure to plastic parts?

don't get me wrong, i love the way my car is now, riding like a gocart, but would this cause any damage to plastic parts which might vibrate into failiure?
what's your opinion about this?

Ausmbtech

The extra stiffness of the engine mount really wouldn't be noticeable by feel. A N/A 55 engine and a 55K engine under cruise conditions would be be generating the same torque to drive at a given speed and both engines weigh about the same and both would be expected to not transmit engine vibrations to the cabin. But a 55K mount is designed to handle a 700NM torque being generated whilst a N/A 55 mount only 500ish.

Even the factory used up-rated mounts when they found they had underrated them. Eg W202 C250TD eventually were upgraded to W203 C32 mounts due to their short lifespan as they were too soft originally.

KJI3jflarryfe93

i guess i don't have anything to worry about using the E55 Kompressor mounts in the c43.
these will last 4-ever now that they are stiffer than the originals!

i had my c43 mounts for 16 years in my car before i switched them for the new ones.
the old ones were still good at 110000km's/16 years of use, with normal engine vibrations.

thanks

blackbenzz

We need custom poly mounts for these cars. Even the 211 55k ones fail and are fluid filled