R class does not have one.....at least i never came across it. usually in the driverside dash panel on the very side where the door meets the dash. but im pretty sure it does not. ive had to replace fuses for the cigar lighter many times and i always have to look at the schematic to find the fuse. most of the fuses are by your spare tire in the back under the floor area on the right side.
Certified MB Master 15yrs
Valentine 1 Radar and Laser Locator 3.893
Galaxy DX 95T Export radio
Mobius Dash Cam