You'll probably find that they changed the suspension bushings too.
We had a problem with bad bushings on non-AMG cars and started using the harder AMG bushings to solve the issue. That practice became so rampant that MB put a restriction on the AMG bushings and started requiring VIN numbers for the vehicles.
I grabbed a bunch of VINs off eBag, Vehix, and Cars.com to get our supply up.