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?