Just be carefull of the spring, they are strong and heavy and if anything slips (jack stand or control arm if unbolted) that spring can go any which way it wants to.

Be cautious, just did this last week almost got per-twanged by the spring as my jack slipped from under the control arm.

Good luck,
Joel

PS> Most of these guys have a lot more experience than me, I've done this work a bunch of times on my Nissan, this is my first experience with a Mercedes. I was surprised at how loaded the spring was even with the car completely suspended by jack stands.