Took my time and spent a day on it. Once the airbox is out of the way, the intake manifold is a bit tricky coz a couple of it's bolts are on the underside. I replaced the intake manifold gaskets but they can be reused (it's not one gasket, instead it's four individual rings, one for each intake port). The SC itself is quite easy, it's held by three bolts...two are accessible from the top and one from below (remove both belly pans). You also have to remove the intake baffle that connects the airbox to the SC inlet, also from below. There is a bracket on the trans that holds a refrigerant line, unbolt this and move it aside for better access when you are working under the car.
While you are at it, change out the SC oil...it's like filling the diff, up to the fill plug. I did mine with the SC out of the car, poured more than enough and just held it horizontal to drain....
If I wasn't taking lots of breaks it could have been done in ~3 hours...
Have fun!
The SC oil....
http://www.ecstuning.com/Mercedes_Be...Oil/ES1609983/