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Home >> Mercedes Benz >> 2016 >> G550 >> Repair and Diagnosis >> Electrical >> Gauges >> Electrical System, Equipment & Instruments - 463 Chassis (1 Of 2) >> Basic Knowledge >> Assignment Of Engine Fuse And Relay Module - GF54.15-P-1256-32GWM

Assignment Of Engine Fuse And Relay Module - GF54.15-P-1256-32GWM

Model 463 (except 463.342) as of Model year 2019 

IMPORTANT Relays J, K, L, M and O are located inside the housing and firmly soldered onto the PCB.

Fig 1: Engine Fuse And Relay Module - Model 463 (except 463.342) As Of Model Year 2019
G13658696Courtesy of MERCEDES-BENZ USA
Slot Fuse Identification Circuit Line ID (line fused) Fused function Rating in amperes (A)
100 Electrical fuse 100 (K40/8f100) 87 - Spare -
101 Electrical fuse 101 (K40/8f101) 87M 2.5 RDGN Valid for engine 176, 177:  ME-SFI [ME] control unit (N3/10) 15
        Valid for engine 656:  CDI control unit (N3/9)  
102 Electrical fuse 102 (K40/8f102) 87M 2.5 RDBU Valid for engine 176, 177:  ME-SFI [ME] control unit (N3/10) 20
        Valid for engine 656:  CDI control unit (N3/9)  
103 Electrical fuse 103 (K40/8f103) 87M 1.5 RDYE Valid for engine 176, 177:  ME-SFI [ME] control unit (N3/10) 15
        Valid for engine 656:  CDI control unit (N3/9)
NOx sensor control unit downstream of SCR catalytic converter (N37/8)
NOx sensor control unit upstream of diesel oxidation catalytic converter (N37/12)
 
104 Electrical fuse 104 (K40/8f104) 87M 1.5 RDBK Valid for engine 176, 177:  ME-SFI [ME] control unit (N3/10) 15
        Valid for engine 656:  CDI control unit (N3/9)  
105 Electrical fuse 105 (K40/8f105) 87 1.0 RDGN Charge air cooler circulation pump 20
106 Electrical fuse 106 (K40/8f106) 87M - Spare -
107 Electrical fuse 107 (K40/8f107) 87 - Spare -
108 Electrical fuse 108 (K40/8f108) 15 0.75 RD Indicator switch for differential lock, rear axle (S76/8) 10
109 Electrical fuse 109 (K40/8f109) 15 - Spare -
110 Electrical fuse 110 (K40/8f110) 30t 1.5 GNRD Right front lamp unit (E2) 20
111 Electrical fuse 111 (K40/8f111) 30t 2.5 RDBK Wiper motor (M6/1) 30
112 Electrical fuse 112 (K40/8f112) 30t - Spare -
113 Electrical fuse 113 (K40/8f113) 50 2.5 VTWH Starter (M1) 30
114 Electrical fuse 114 (K40/8f114) 87 - Spare -
115 Electrical fuse 115 (K40/8f115) 87 - Spare -
116 Electrical fuse 116 (K40/8f116) 87 - Spare -
117 Electrical fuse 117 (K40/8f117) 30t 0.5 RDWH Valid for engine 176:  Circuit 87M relay (K40/8kN) 7.5
118 Electrical fuse 118 (K40/8f118) 87C 1.0 RDGN Low-temperature circuit circulation pump 1 (M43/6) 15
119 Electrical fuse 119 (K40/8f119) 87C 1.0 RDBU Circuit 87 C end sleeve (Z141/1z1) 15
120 Electrical fuse 120 (K40/8f120) 30t - Spare -
121 Electrical fuse 121 (K40/8f121) 15 0.75 RD Park pawl capacitor (C8) 10
122 Electrical fuse 122 (K40/8f122) 15 0.5 BUWH Valid with code EM4 (Driving Assistance Package Plus):  Integrated outer right rear bumper radar sensor (B92/6) Integrated outer left rear bumper radar sensor (B92/11) 5
123 Electrical fuse 123 (K40/8f123) 15 0.5 BKRD Front SAM control unit (N10/6) 5
124 Electrical fuse 124 (K40/8f124) 30t - Spare  
125 Electrical fuse 125 (K40/8f125) 15 0.5 PKRD Powertrain control unit (N127) 5
126 Electrical fuse 126 (K40/8f126) 15 0.5 PKRD DISTRONIC distance pilot controller unit (A108/1) Exterior lights switch (S1) 5
127 Electrical fuse 127 (K40/8f127) 50 - Spare -
128 Electrical fuse 128 (K40/8f128) 15 - Spare -
129 Electrical fuse 129 (K40/8f129) 15 0.5 RD Electronic Stability Program control unit (N30/4) 5
130 Electrical fuse 130 (K40/8f130) 15 - Spare -
131 Electrical fuse 131 (K40/8f131) 87 - Spare -
131A Electrical fuse 131 a (K40/8f131a) 15 - Spare -
132 Electrical fuse 132 (K40/8f132) 87 0.75 RD Indicator switch for differential lock, front axle (S76/9) 10
133 Electrical fuse 133 (K40/8f133) 30t 1.5 PKRD Left front lamp unit (E1) 20
Relay Identification Designation
G Engine compartment circuit 15 relay (K40/8kG)
H Starter circuit 50 relay (K40/8kH)
I Spare
J CPC relay (K40/8kJ)
K Spare
L Spare
M Fan relay (K40/8kM)
N Circuit 87M relay (K40/8kN)
O Spare
P Spare
Q Spare
R Differential lock switch relay (K40/8kR)
Relays J, K, L, M and O are located inside the housing and firmly soldered onto the PCB.