Pritty straight forward, simply remove the inner door panal, remove 3 10mm head bolts and the pin and replace. If you want to do a nice job, paint strap with touch up first to match your vehicle.
Note - the 3 10mm bolts usally come loose, use lock tite when re-installing.
Mercedes-Benz Master Guild - 2 years
Shop Foreman - 20 + years - dealer.
Part owner - MBZ Transmission remanufacture