I don't know about E220 (not in USA)
but just like BENZMAC say Be sure to check the strip fuse that is located on or near the drivers side strut tower. It is a small box about an inch by two. Open it and with the car and blower off (fuse cooled off), push on it, if it breaks, it was at fault. The regulator for the blower is located under the blower motor and is pretty difficult to replace not to mention expensive.
(strip fues is not in main fuse box)
MB STARS Master Guild Technician,12 years MB tech
5 years independent shop owner