Originally Posted by MTI

Yes, the procedure calls for compression and removal of the coil spring, because that's the safest way to do it. The Mercedes internal compressor is the proper tool. However, if you're willing to risk (bodily injury, damage to surrounding components) then you can release the spring by jacking up the car, using a jack under the control arm, undoing the control arm and then lowering the control arm by slowly releasing the jack to release the spring tension and drop the spring from the upper perch. I've done it both ways and prefer using the spring tool just for peace of mind.

Do change out the strut mounts, spring pad, strut boots and the bump stop. Yes, you should get the front end aligned.