Remove/install main fuse of positive line - AR54.15-P-0051MCU

MODEL 451.3 /4 (except 451.391 /491) 

Starter/alternator prefuse 

Fig 1: Identifying Bottom Cover, Top Cover, Nut And Starter/Alternator Fuse

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
1	Disconnect battery ground line		AR54.10-P-0003MCC
2	Unclip top cover (2) from bottom cover (1) and remove top cover (2) as well as bottom cover (1)
3	Unscrew nuts (3) and remove starter/alternator fuse (F58)	Replace self-locking nuts (3).
4	Install in the reverse order