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Assignment Of Rear Fuse And Relay Module - GF54.15-P-1256-30RFN

WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.

Model 253 (except 253.99) 

as of Model year 2020 

Fig 1: Rear Fuse And Relay Module - Model 253 (Except 253.99) As Of Model Year 2020 (Variant 1)
G14472171Courtesy of MERCEDES-BENZ USA
Slot Fuse Identification Circuit Wire
Identification		 Fused component Fuse rating (A)
400 Electrical fuse 400 (K40/5f400) 87 - Spare -
401 Electrical fuse 401 (K40/5f401) 87 - Spare -
402 Electrical fuse 402 (K40/5f402) 87 - Spare -
403 Electrical fuse 403 (K40/5f403) 87 0.35 PKGN With code U67 (230 V socket in rear): 
DC/AC converter control unit (N24/3)		 5
404 Electrical fuse 404 (K40/5f404) 87 2.5 RDGN Driver seat partially electric seat adjustment switch (S22/1) 30
405 Electrical fuse 405 (K40/5f405) 87 2.5 RDYE Front passenger seat partially electric seat adjustment switch (S23/1) 30
406 Electrical fuse 406 (K40/5f406) 30t 2.5 RD LHD vehicles: 
Left front door control unit (N69/1)		 30
        Right-hand steering  :
Right front door control unit (N69/2)		  
407 Electrical fuse 407 (K40/5f407) 30t 2.5 RD With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor): 
Trailer recognition control unit (N28/1)		 30
408 Electrical fuse 408 (K40/5f408) 30t 2.5 RDWH LHD vehicles: 
Left rear door control unit (N69/3)		 30
        Right-hand steering: 
Right rear door control unit (N69/4)		  
409 Electrical fuse 409 (K40/5f409) 30t 1.0 RDGN With code U79 (BlueTEC (SCR) diesel exhaust treatment, 3rd generation): 
AdBlue® control unit (N118/5)		 15
410 Electrical fuse 410 (K40/5f410) 30t 2.5 RDWH With code 467 (Electronic differential lock): 
Electronic differential control unit (N3/2)		 25
411 Electrical fuse 411 (K40/5f411) 30t 4.0 RD With code 299 (PRE-SAFE): 
Left front reversible emergency tensioning retractor (A76)		 30
412 Electrical fuse 412 (K40/5f412) 30t 0.75 RD With code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)): 
Battery management system control unit (N82/2)		 5
413 Electrical fuse 413 (K40/5f413) 30t 0.5 RDBK Engine 264 with code B01 (48V technology): 
48 V on-board electrical system battery (G1/3)		 5
414 Electrical fuse 414 (K40/5f414) 30t 0.35 RDWH With code 475 (Tire pressure monitor (TPM)): 
Tire pressure monitor control unit (N88)		 5
      0.5 RDWH With code 865 (Digital TV tuner): 
TV tuner control unit (N143)		  
415 Electrical fuse 415 (K40/5f415) 30t 0.35 RDYE With code P21 (Air quality package): 
Perfume atomizer generator (N59)		 5
416 Electrical fuse 416 (K40/5f416) 30t 1.0 RD With code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)): 
Alternating current charger for high-voltage battery (N83/11)		 10
417 Electrical fuse 417 (K40/5f417) 30t 0.35 RD With code 218 (Reversing camera) and except code 235 (Parking Pilot with PARKTRONIC): 
Reversing camera control unit (N66/2)		 7.5
418...424 Electrical fuse 418 (K40/5f418) - Electrical fuse 424 (K40/5f424) 30t   Spare  
425 Electrical fuse 425 (K40/5f425) 30t 0.35 RDWH With code 409 (Front left and right multicontour seats): 
Right front multicontour seat control unit (N32/16)		 5
      0.5 RDWH With code 222 (Electrically adjustable right front seat), code 242 (Electrically adjustable front passenger seat with memory function), code 275 (Memory package (driver's seat, steering column and mirrors)) or code P65 (Seat Comfort Package) and except code 409 (Front left and right multicontour seats): 
Front passenger seat lumbar support electropneumatic controller unit (N32/24)		  
426 Electrical fuse 426 (K40/5f426) 30t 0.35 RDWH With code 409 (Front left and right multicontour seats): 
Left front multicontour seat control unit (N32/15)		 5
        With code 221 (Electrically adjustable left driver's seat), code 241 (Memory switch for electrically adjustable left front passenger seat), code 275 (Memory Package (driver's seat, steering column and mirrors)) or code P65 (Seat Comfort Package) and except code 409 (Front left and right multicontour seat): 
Driver's seat lumbar support electropneumatic controller unit (N32/23)		  
427 Electrical fuse 427 (K40/5f427) 30t 2.5 RDGN With code 970 (Police emergency vehicles) or code 974 (Fire brigade lead emergency vehicle pre-installation) or code 975 (Emergency physician vehicle pre-installation): 
Special vehicle multifunction control unit (SVMCU) (N26/14)		 25
428 Electrical fuse 428 (K40/5f428) 30t 0.5 RDYE With code 467 (Electronic differential lock): 
Electronic differential control unit (N3/2)		 5
429 Electrical fuse 429 (K40/5f429) 30t 1.0 RDWH AIR BODY CONTROL Plus control unit (N51/8) 15
430...442 Electrical fuse 430 (K40/5f430) - Electrical fuse 442 (K40/5f442) 30t   Spare  
443 Electrical fuse 443 (K40/5f443) 30t 2.5 RDWH With code 970 (Police emergency vehicles) or code 974 (Fire brigade lead emergency vehicle pre-installation) or code 975 (Emergency physician vehicle pre-installation): 
Special vehicle multifunction control unit (SVMCU) (N26/14)		 25
444 Electrical fuse 444 (K40/5f444) 30t 1.5 RDBU With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 15
445 Electrical fuse 445 (K40/5f445) 30t 2.5 RDGY With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 15
446 Electrical fuse 446 (K40/5f446) 30t 2.5 RD With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 25
447 Electrical fuse 447 (K40/5f447) 30t 1.5 RDWH With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 15
448 Electrical fuse 448 (K40/5f448) 30t 2.5 RDYE With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 25
449 Electrical fuse 449 (K40/5f449) 30t 2.5 RD With code U67 (230 V socket in rear) or code U80 (115V socket): 
DC/AC converter control unit (N24/3)		 30
450 Electrical fuse 450 (K40/5f450) 30t 2.5 RDBU With code 970 (Police emergency vehicles) or code 974 (Fire brigade lead emergency vehicle pre-installation) or code 975 (Emergency physician vehicle pre-installation): 
Vehicle socket electrical connection (X4/36)		 25
451 Electrical fuse 451 (K40/5f451) 30t 2.5 RD With code 872 (Left and right rear seat heating): 
Rear seat heater control unit (N25/6)		 30
452 Electrical fuse 452 (K40/5f452) 30t 2.5 RDYE With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor) and code 494 (USA version) or code 460 (Canada version): 
Trailer recognition control unit (N28/1)		 30
453 Electrical fuse 453 (K40/5f453) 30t 2.5 RD Fuel system control unit (N118) 25
454 Electrical fuse 454 (K40/5f454) 30t 4.0 RDBK With code 299 (PRE-SAFE): 
Right front reversible emergency tensioning retractor (A76/1)		 30
455 Electrical fuse 455 (K40/5f455) 87 1.5 RDBU With code 866 (Pre-installation for Rear Seat Entertainment System): 
Left tablet PC electrical connection (X99x1) Right tablet PC electrical connection (X99x2)		 15
456 Electrical fuse 456 (K40/5f456) 87 1.5 RD Luggage compartment socket (X58/12) 15
457 Electrical fuse 457 (K40/5f457) 87 1.5 RDBK With code 301 (Ashtray package): 
Front cigarette lighter with ashtray illumination (R3)		 15
        With code 460 (Canada version) or code 494 (USA version) and code 897 (Front wireless telephone charging) or code 899 (Multifunction telephony): 
Front passenger footwell socket (X58/40)		  
458 Electrical fuse 458 (K40/5f458) 87 1.5 RDBK Right rear center console socket 12V (X58/18) 15
459...460 Electrical fuse
459 (K40/5f459) - Electrical fuse
460 (K40/5f460)		 87   Spare  
461 Electrical fuse 461 (K40/5f461) 30t 1.5 RDBU With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor) and code 494 (USA version) or code 460 (Canada version): 
Trailer recognition control unit (N28/1)		 15
462...466 Electrical fuse 462 (K40/5f462) - Electrical fuse 466 (K40/5f466) 87   Spare  
467 Electrical fuse 467 (K40/5f467) 30t 0.35 RDWH With code 475 (Tire pressure monitor (TPM)): 
Tire pressure monitor control unit (N88)		 5
468 Electrical fuse 468 (K40/5f468) 30t 0.35 RDWH With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor): 
Trailer recognition control unit (N28/1)		 68
469 Electrical fuse 469 (K40/5f469) 30t 0.35 RD With code 871 (Sensor system for trunk lid opening/closing): 
Rear switching module (N38)		 5
470 Electrical fuse 470 (K40/5f470) 30t 1.5 RDWH Spare -
471 Electrical fuse 471 (K40/5f471) 30t - With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor): 
Trailer recognition control unit (N28/1)		 15
472 Electrical fuse 472 (K40/5f472) 30t 0.35 RDWH With code 23P (Driving Assistance Package): 
Mercedes-Benz Intelligent Drive control unit (N62/4)		 5
473 Electrical fuse 473 (K40/5f473) 30t 4.0 RD With code 810 (Premium sound system): 
Sound system amplifier control unit (N40/3)		 40
        With code 853 ("Midline" sound system): 
Midline sound system amplifier control unit (N40/2)		  
474 Electrical fuse 474 (K40/5f474) 87 2.5 RDBU Rear window interference suppression capacitor (C3) Rear window heater (R1) 30
475 Electrical fuse 475 (K40/5f475) 30t 4.0 RD With code 890 (automatic rear-end door): 
Liftgate control unit (N121/1)		 40
476 Electrical fuse 476 (K40/5f476) 30t 4.0 RD Rear SAM control unit (N10/8) 40
477 Electrical fuse 477 (K40/5f477) 30t 4.0 RD Rear SAM control unit (N10/8) 40
478 Electrical fuse 478 (K40/5f478) 30t 4.0 RDWH With code U79 (BlueTEC (SCR) diesel exhaust treatment, 3rd generation): 
AdBlue® control unit (N118/5)		 40
479...484 Electrical fuse 479 (K40/5f479) - Electrical fuse 484 (K40/5f484) 30t - Spare -
NOTE: The rear fuse and relay module is installed in two variants, depending on the equipment involved.
Relay Identification Designation
S Vehicle interior circuit 15 relay (K40/5kS)
T Rear window heater relay (K40/5kT)
U 2nd seat row cup holder and sockets relay (K40/5kU)
V With code U79 (BlueTEC (SCR) diesel exhaust treatment, 3rd generation): 
AdBlue® relay (K40/5kV)
X 1 st seat row/trunk refrigerator box and sockets relay (K40/5kX)
Y Spare relay (K40/5kY)

Variant 1 

Fig 2: Rear Fuse And Relay Module - Model 253 (Except 253.99) As Of Model Year 2020 (Variant 2)
G14472172Courtesy of MERCEDES-BENZ USA
Slot Fuse Identification Circuit Wire
Identification		 Fused component Fuse rating (A)
400 Electrical fuse 400 (K40/5f400) 87 - Spare -
401 Electrical fuse 401 (K40/5f401) 87 - Spare -
402 Electrical fuse 402 (K40/5f402) 87 - Spare -
403 Electrical fuse 403 (K40/5f403) 87 0.35 PKGN With code U67 (230 V socket in rear): 
DC/AC converter control unit (N24/3)		 5
404 Electrical fuse 404 (K40/5f404) 87 2.5 RDGN Driver seat partially electric seat adjustment switch (S22/1) 30
405 Electrical fuse 405 (K40/5f405) 87 2.5 RDYE Front passenger seat partially electric seat adjustment switch (S23/1) 30
406 Electrical fuse 406 (K40/5f406) 30t 2.5 RD LHD vehicles: 
Left front door control unit (N69/1)		 30
        Right-hand steering  :
Right front door control unit (N69/2)		  
407 Electrical fuse 407 (K40/5f407) 30t 2.5 RD With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor): 
Trailer recognition control unit (N28/1)		 30
408 Electrical fuse 408 (K40/5f408) 30t 2.5 RDWH LHD vehicles: 
Left rear door control unit (N69/3)		 30
        Right-hand steering: 
Right rear door control unit (N69/4)		  
409 Electrical fuse 409 (K40/5f409) 30t 1.0 RDGN With code U79 (BlueTEC (SCR) diesel exhaust treatment, 3rd generation): 
AdBlue® control unit (N118/5)		 15
410 Electrical fuse 410 (K40/5f410) 30t 2.5 RDWH With code 467 (Electronic differential lock): 
Electronic differential control unit (N3/2)		 25
411 Electrical fuse 411 (K40/5f411) 30t 4.0 RD With code 299 (PRE-SAFE): 
Left front reversible emergency tensioning retractor (A76)		 30
412 Electrical fuse 412 (K40/5f412) 30t 0.75 RD With code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)): 
Battery management system control unit (N82/2)		 5
413 Electrical fuse 413 (K40/5f413) 30t 0.5 RDBK Engine 264 with code B01 (48V technology): 
48 V on-board electrical system battery (G1/3)		 5
414 Electrical fuse 414 (K40/5f414) 30t 0.35 RDWH With code 475 (Tire pressure monitor (TPM)): 
Tire pressure monitor control unit (N88)		 5
      0.5 RDWH With code 865 (Digital TV tuner): 
TV tuner control unit (N143)		  
415 Electrical fuse 415 (K40/5f415) 30t 0.35 RDYE With code P21 (Air quality package): 
Perfume atomizer generator (N59)		 5
416 Electrical fuse 416 (K40/5f416) 30t 1.0 RD With code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)): 
Alternating current charger for high-voltage battery (N83/11)		 10
417 Electrical fuse 417 (K40/5f417) 30t 0.35 RD With code 218 (Reversing camera) and except code 235 (Parking Pilot with PARKTRONIC): 
Reversing camera control unit (N66/2)		 7.5
418...424 Electrical fuse 418 (K40/5f418) - Electrical fuse 424 (K40/5f424) 30t   Spare  
425 Electrical fuse 425 (K40/5f425) 30t 0.35 RDWH With code 409 (Front left and right multicontour seats): 
Right front multicontour seat control unit (N32/16)		 5
      0.5 RDWH With code 222 (Electrically adjustable right front seat), code 242 (Electrically adjustable front passenger seat with memory function), code 275 (Memory package (driver's seat, steering column and mirrors)) or code P65 (Seat Comfort Package) and except code 409 (Front left and right multicontour seats): 
Front passenger seat lumbar support electropneumatic controller unit (N32/24)		  
426 Electrical fuse 426 (K40/5f426) 30t 0.35 RDWH With code 409 (Front left and right multicontour seats): 
Left front multicontour seat control unit (N32/15)		 5
        With code 221 (Electrically adjustable left driver's seat), code 241 (Memory switch for electrically adjustable left front passenger seat), code 275 (Memory Package (driver's seat, steering column and mirrors)) or code P65 (Seat Comfort Package) and except code 409 (Front left and right multicontour seat): 
Driver's seat lumbar support electropneumatic controller unit (N32/23)		  
427 Electrical fuse 427 (K40/5f427) 30t 2.5 RDGN With code 970 (Police emergency vehicles) or code 974 (Fire brigade lead emergency vehicle pre-installation) or code 975 (Emergency physician vehicle pre-installation): 
Special vehicle multifunction control unit (SVMCU) (N26/14)		 25
428 Electrical fuse 428 (K40/5f428) 30t 0.5 RDYE With code 467 (Electronic differential lock): 
Electronic differential control unit (N3/2)		 5
429 Electrical fuse 429 (K40/5f429) 30t 1.0 RDWH AIR BODY CONTROL Plus control unit (N51/8) 15
430...442 Electrical fuse 430 (K40/5f430) - Electrical fuse 442 (K40/5f442) 30t   Spare  
443 Electrical fuse 443 (K40/5f443) 30t 2.5 RDWH With code 970 (Police emergency vehicles) or code 974 (Fire brigade lead emergency vehicle pre-installation) or code 975 (Emergency physician vehicle pre-installation): 
Special vehicle multifunction control unit (SVMCU) (N26/14)		 25
444 Electrical fuse 444 (K40/5f444) 30t 1.5 RDBU With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 15
445 Electrical fuse 445 (K40/5f445) 30t 2.5 RDGY With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 15
446 Electrical fuse 446 (K40/5f446) 30t 2.5 RD With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 25
447 Electrical fuse 447 (K40/5f447) 30t 1.5 RDWH With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 15
448 Electrical fuse 448 (K40/5f448) 30t 2.5 RDYE With CODE 550 (Trailer hitch): 
Trailer recognition control unit (N28/1)		 25
449 Electrical fuse 449 (K40/5f449) 30t 2.5 RD With code U67 (230 V socket in rear) or code U80 (115V socket): 
DC/AC converter control unit (N24/3)		 30
450 Electrical fuse 450 (K40/5f450) 30t 2.5 RDBU With code 970 (Police emergency vehicles) or code 974 (Fire brigade lead emergency vehicle pre-installation) or code 975 (Emergency physician vehicle pre-installation): 
Vehicle socket electrical connection (X4/36)		 25
451 Electrical fuse 451 (K40/5f451) 30t 2.5 RD With code 872 (Left and right rear seat heating): 
Rear seat heater control unit (N25/6)		 30
452 Electrical fuse 452 (K40/5f452) 30t 2.5 RDYE With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor) and code 494 (USA version) or code 460 (Canada version): 
Trailer recognition control unit (N28/1)		 30
453 Electrical fuse 453 (K40/5f453) 30t 2.5 RD Fuel system control unit (N118) 25
454 Electrical fuse 454 (K40/5f454) 30t 4.0 RDBK With code 299 (PRE-SAFE): 
Right front reversible emergency tensioning retractor (A76/1)		 30
455 Electrical fuse 455 (K40/5f455) 87 1.5 RDBU With code 866 (Pre-installation for Rear Seat Entertainment System): 
Left tablet PC electrical connection (X99x1) Right tablet PC electrical connection (X99x2)		 15
456 Electrical fuse 456 (K40/5f456) 87 1.5 RD Luggage compartment socket (X58/12) 15
457 Electrical fuse 457 (K40/5f457) 87 1.5 RDBK With code 301 (Ashtray package): 
Front cigarette lighter with ashtray illumination (R3)		 15
        With code 460 (Canada version) or code 494 (USA version) and code 897 (Front wireless telephone charging) or code 899 (Multifunction telephony): 
Front passenger footwell socket (X58/40)		  
458 Electrical fuse 458 (K40/5f458) 87 1.5 RDBK Right rear center console socket 12V (X58/18) 15
459...460 Electrical fuse
459 (K40/5f459) - Electrical fuse
460 (K40/5f460)		 87   Spare  
461 Electrical fuse 461 (K40/5f461) 30t 1.5 RDBU With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor) and code 494 (USA version) or code 460 (Canada version): 
Trailer recognition control unit (N28/1)		 15
462...466 Electrical fuse 462 (K40/5f462) - Electrical fuse 466 (K40/5f466) 87   Spare  
467 Electrical fuse 467 (K40/5f467) 30t 0.35 RDWH With code 475 (Tire pressure monitor (TPM)): 
Tire pressure monitor control unit (N88)		 5
468 Electrical fuse 468 (K40/5f468) 30t 0.35 RDWH With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor): 
Trailer recognition control unit (N28/1)		 68
469 Electrical fuse 469 (K40/5f469) 30t 0.35 RD With code 871 (Sensor system for trunk lid opening/closing): 
Rear switching module (N38)		 5
470 Electrical fuse 470 (K40/5f470) 30t 1.5 RDWH Spare -
471 Electrical fuse 471 (K40/5f471) 30t - With code 550 (Trailer hitch) or code 553 (Trailer hitch with turning angle sensor): 
Trailer recognition control unit (N28/1)		 15
472 Electrical fuse 472 (K40/5f472) 30t 0.35 RDWH With code 23P (Driving Assistance Package): 
Mercedes-Benz Intelligent Drive control unit (N62/4)		 5
473 Electrical fuse 473 (K40/5f473) 30t 4.0 RD With code 810 (Premium sound system): 
Sound system amplifier control unit (N40/3)		 40
        With code 853 ("Midline" sound system): 
Midline sound system amplifier control unit (N40/2)		  
474 Electrical fuse 474 (K40/5f474) 87 2.5 RDBU Rear window interference suppression capacitor (C3) Rear window heater (R1) 30
475 Electrical fuse 475 (K40/5f475) 30t 4.0 RD With code 890 (automatic rear-end door): 
Liftgate control unit (N121/1)		 40
476 Electrical fuse 476 (K40/5f476) 30t 4.0 RD Rear SAM control unit (N10/8) 40
477 Electrical fuse 477 (K40/5f477) 30t 4.0 RD Rear SAM control unit (N10/8) 40
478 Electrical fuse 478 (K40/5f478) 30t 4.0 RDWH With code U79 (BlueTEC (SCR) diesel exhaust treatment, 3rd generation): 
AdBlue® control unit (N118/5)		 40
479...484 Electrical fuse 479 (K40/5f479) - Electrical fuse 484 (K40/5f484) 30t - Spare -
NOTE: The rear fuse and relay module is installed in two variants, depending on the equipment involved.
Relay Identification Designation
S Vehicle interior circuit 15 relay (K40/5kS)
T Rear window heater relay (K40/5kT)
U 2nd seat row cup holder and sockets relay (K40/5kU)
V With code U79 (BlueTEC (SCR) diesel exhaust treatment, 3rd generation): 
AdBlue® relay (K40/5kV)
X 1 st seat row/trunk refrigerator box and sockets relay (K40/5kX)
Y Spare relay (K40/5kY)

Variant 2 

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