chk out http://www.detali.ru/cat/oem_mb.asp
play around and you'll find a diagram

also chk out 'Buy Parts' on the top of any www.peachparts.com page. go to the front bearing I think it's under 'Driveshaft and axle`

kind of lucky you have a sealed bearing lot easier to replace. I've never done the job on a 220, but I have on other models.

You'd also have to remove the caliper bracket

The hub should pull off the spindle with no problem once the lock nut is screwed off, ( but it is true that on some cars the hub won't just pull right off) also order a new bearing cap (hub cap).

I haven't done the job on your car, but I would assume the front bearing needs to be tightened to a proper specification.. On my car I needed to use a dial gauge, I tried doing it by feel but was never even close to the what the dial indicator showed as correct - and it took multiple tries with the dial gauge.