Nick, for adequate access to the engine mounts recommend raising the entire car off the ground 9" to 12" ... place a stack of pieces of 2" x 6" wood under the tires, or a short piece of 6" x 6" under each jacking pad.

As you have realized replacing the driver's side engine mount is far more difficult than the passenger's side. When I recently replaced the engine mounts in our 1995 E320 I removed each engine mounting bracket with the engine mount attached. Then attached the new engine mount to the engine mounting bracket and reinstalled the assembly. That approach was easier than attempting to remove the bolt attaching the engine mount to the engine mounting bracket with both in place.

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Fred Hoelzle