Does your wife has a sister?
...Oopps, never mind I am married.
:p
To answer the question. I am a DIY'er so I have mostly Craftsman and a few NO name brand for a one time use tools. Since I got the Benz, I bought a few MB specific tools. Not necessarily from MB.
I do not have a compressor but, I do have access to one and a lift for a minima hourly fee.
A life saver sometimes...