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 W220,W210/W203/204/W221
Offset 16mm Engine Mount Socket Wrench for Mercedes Benz W220/W210/W203/W221k
Offset 16mm Engine Mount Socket Wrench For Mercedes Benz W220/ W210/W203/W221
1x Offset 16mm Engine Mount Socket Wrench Fits Mercedes Benz W220,W210,W203,221
Offset 16mm Engine Mount Socket Wrench Fits for Mercedes Benz W220,W210,W203,221
Offset 16mm Engine Mount Socket Wrench for Mercedes Benz W220/W210/W203/W221