Brake pad spreader?
I have always used a common old C-clamp to push the piston back into the caliper assembly. It seems to work quite well.
I have never done a brake job on a Mercedes, though. Will a c-clamp work, or should I be on the lookout for the thing that looks like a scissors-jack?
What do you call it, by the way?
Semibodacious Transmogrifications a Specialty
1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)
"Time flies like and arrow, yet fruit flies like a banana"