Zerex G-05, which should be commonly available at auto parts stores is the same formulation as MB brand and is MB approved. (Read the label.)

If you have a commercial shop do the job, buy a suitable quantity of G-05 and distilled water to make a 50/50 blend and tell them to install it. The system should first be thoroughly drained (radiator AND block drains) then thoroughly flushed out with water before installing the G-05.

Duke