you should get a proper spring compressor for mercedes springs if you want to do them yourself.
IT can be very dangerous.
I let my mech do the springs, his price was reasonable, and I had him swap the spring pads around a few times before it looked the way I wanted.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.