To make it easier on yourself loosen the top bolt with the engine mount offset tool then use a stubby 5/8 combination ratcheting wrench to remove the bolt. 3/8" socket drive.
Offset 16mm Engine Mount Socket Wrench For Mercedes Benz
1x Offset 16mm Engine Mount Socket Wrench Fits Mercedes Benz W220,W210,W203,221
Offset 16mm Engine Mount Wrench for Mercedes Benz
Offset 16mm Engine Mount Wrench for Mercedes Benz W203/204 W210/211 W220/221
1pc Offset 16mm Engine Mount Socket Wrench 4693 for Mercedes Benz W219 W221 W204