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Home >> Mercedes Benz >> 2020 >> S450 Base >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System, Equipment & Instruments - 222 Chassis (05 Of 10) >> Testing & Repair >> Remove/Install Left Front Engine Compartment Fuse And Relay Module - AR54.15-P-1257LF

Remove/Install Left Front Engine Compartment Fuse And Relay Module - AR54.15-P-1257LF

Model 217, 222 

Fig 1: Left Front Engine Compartment Fuse And Relay Module Components Location - Model 222 (Shown On Model 222)
G15370484Courtesy of MERCEDES-BENZ USA

Shown On Model 222 

Topical note  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Detach ground line of on-board electrical system battery   AR54.10-P-0003LF 
2 Open engine hood    
3 Remove cover (1)    
4 Remove screws/bolts (2) and remove cover (3)    
5 Unlock catch hooks (arrows A, B, C) on housing (4) and remove engine fuse and relay module (K40/8) from the housing (4) and turn it around IMPORTANT First, unlock catch hook (arrow A), then catch hook (arrow B) and then the catch hook (arrow C).  
6 Remove positive line (5) from engine fuse and relay module (K40/8) TORQUE SPECIFICATION Nut, positive terminal to engine fuse and relay module *BA54.15-P-1005-01J 
7 Separate electrical connectors (6)    
8 Unclip fuse holder (7) from engine fuse and relay module (K40/8) IMPORTANT To do this, unlock the shackles on the side of the fuse holders (7).  
9 Remove engine fuse and relay module (K40/8    
10 Install in the reverse order    
FUSE AND RELAY BOX

Number Designation Model 217 Model 222
BA54.15-P-1005-01J Nut, positive terminal to engine fuse and relay module M8 Nm 16 16