As I said before, Ive havent removed MM on a c280 m112 before, but after reviewing duh_vinci's video post, it looks like a pretty straightforward job, only tiresome to have to move the compressor to access what you need to access (MBs engineers' way of saying FU and pay us to do the job...)
And yes, use penetrating oil spray. Makes life easier. Brute strength to loosen a 'hard to access' nut?? AND then have it snap on you after all that preparation work??
been there, done that, No thanks.