I have an AAM for an early ML320. As mine is #274, it didn't work according to the shop. The stuff you need to know:
MB# A163 545 47 32
It looks like the shop was able to break one of the 2 plastic clips off the unit, but other than that it's new. I paid too much for it, but will part with it for $200.00 US. I have listed it on ebay, but the only bid I've had was for $50, and I will NOT sell it that cheap. I'd rather dig into it and see if I can figure out how to fix it for that money(or break it, and learn to fix the one that isn't working in my ML).
Please email firstname.lastname@example.org
if interested. I will entertain any reasonable offer as it one of too many "spares" I've gathered for vehicles....