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Fuse Assignment Of Fuse Box For 48V Onboard Electrical System In Engine Compartment - GF54.15-P-1256-46FR

Model 257, 290 with code B01 (48V technology) 

Side view, front view 

Fig 1: 48V Onboard Electrical System Fuse Box (Engine Compartment) - Model 257 With Code B01
G14549322Courtesy of MERCEDES-BENZ USA
Connection Fuse Identification Circuit Wire Identification Fused component Fuse rating (A)
A1.1 Electrical fuse 851 (F153/2f851) -   Spare 40
A1.2 Electrical fuse 852 (F153/2f852) 40 4.0 RDGN With code 597 (Windshield, heated): 
Windshield heater control unit (N61)
40
A1.3 Electrical fuse 853 (F153/2f853) 40 4.0 RD Engine 256, 264: 
Electric coolant pump (M75/11)
40
A2 Electrical fuse 854 (F153/2f854) 40 16.0 RD Engine 256 with code M016 (Engine, boosted high performance): Electric additional compressor (M60/1) 125
A3 Electrical fuse 855 (F153/2f855) 40 25.0 RD Engine 256: 
Electric refrigerant compressor (A9/5)
175
E1 - 40 50.0 RD 48 V on-board electrical system battery (G1/3) -
E2 - 40 50.0 RD Engine 256: 
Starter-alternator control unit (N129)
-
        Engine 264: 
Starter alternator (M1/10)