Just replace the whole upper control arm as a unit, 123 330 46 07 and 123 330 47 07 for RHS and LHS respectively. Get Lemforder only or original Benz parts. You have to unload the front suspension to do this job, not too hard but indeed any tyre/alignment shop can also easily do this job. Also replace the rubber bearings, 116 333 01 17, 2x per side.