The AMG Factor and the ML63 Suspension Bush

[BENZE220AMG]

Car number 164 is an ML63 AMG. Even though there is no play in either of them, the hydro-bushes in the back of the vehicle are leaking from the front and rear of the vehicle.

These suspension arms are same across the board on the W164s; however, the AMG models are the only ones with hydro-bushes, while the rest of the models utilise solid rubber or metal components, meaning that an arm from a different version will fit on the 63. The arm is fastened to the bush and mounting casting using a single big bolt that passes through the center.


If your vehicle isn't an AMG, you can easily find aftermarket replacement bushes from a number of manufacturers. One option is an exceptionally affordable Chinese set that includes all the bushes for both arms, but I'm not interested in that. Autodoc sells two for £150, however I haven't compared the reviews of Ridex, Esen, Metzger, Sidem, RTS, ALTE, or Spidan to determine which brand is better. Also, I haven't looked into how much a pair from Mercedes would cost.

Unfortunately, MB does not sell only the bushes, and no aftermarket vendor offers them, perhaps because to the low production numbers of AMGs. Therefore, a set of new arms is the sole option for replacement; £1300 to you, squire (I'm not sure whether that amount includes VAT...). :oops: :oops:

Just a couple of the regular, non-AMG bushes would have sufficed; I don't see how hydro- or solid-rubber would have made much of a difference in such a tiny bush. Who here thinks this is a poor plan?

[MidnightMarauder]

I would follow your lead.

[BENZE220AMG]

So far, nothing has been done for me. Wayne Gates just completed the service and inspection on the vehicle, and they noticed the problem. Two months from now is when the MoT test is due, so I will put it in and see if it passes then. Assuming the bush rubber is in good shape and does not have any play, it should pass the MoT Tester's Manual. In that case, I suppose it's time to give it a little TLC...

[johnmayerrr]

In my opinion, it's a bust....

From the suspension section of the guidebook.


A major defect (failure) exists when the bush actively drips oil or fluid, becomes extensively covered, or has compromised damping or structural performance.
Potential Hazard: These bushes are engineered to dampen vibrations and are frequently loaded with hydraulic oil. The stability, control, and handling of the vehicle might be compromised if they malfunction.
An advise may be issued instead of an immediate fail in the event that the bush is just slightly wet or has small residue (a "mist" or light weep) but is not excessively covered in oil, as long as the component is still functional.

[BENZE220AMG]

The problem is:If a bush is "excessively worn" (Category 5.3.4.a.i) or if there are substantial fluid leakage that could cause harm to people or the environment, it is classified as a major defect.

I don't think it is; I think it will be an advisory. I've been informed that there is no bleeding, play, or excessive fluid leakage. Over time, I will discover the answer...