If it is original Mercedes which I'm sure it is unless it has been changed the part numbers should look something like this[ 170-330-01-07-mbz.] Pelican parts has them listed from 3 different manufacturers and they range in price from $94 up to 439.00 For genuine Mercedes replacement part and they all come with bushings installed but no ball joint included. All Crossfires are built on the r170 platform using the same suspension and steering and brake components as the SLK series.