The sixth-generation Mercedes-Benz S-Class (W222, C217, A217), available from 2014 to 2020, represents the pinnacle of luxury, innovation, and performance. As Mercedes-Benz’s flagship sedan and coupe, this generation introduced cutting-edge technology, refined comfort, and powerful engine options, making it a benchmark in the luxury automobile segment.
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Search common fuse types, fuse kits and relay options for your vehicle.
In this article, you will find fuse box diagrams for the Mercedes-Benz S-Class, covering models S300, S350, S400, S450, S500, S550, S560, S600, S650, S63 AMG, and S65 AMG for the years 2014, 2015, 2016, 2017, 2018, 2019, and 2020. These diagrams provide essential insights into the fuse layout, helping vehicle owners, mechanics, and technicians locate and understand the function of each fuse and relay.
What’s Included:
Fuse Box Diagrams – Clear and detailed visuals to help identify fuses, relays, and circuit breakers.
Fuse Panel Locations – Step-by-step guidance on where to find the fuse panels inside the Mercedes-Benz S-Class.
Fuse Assignments – Comprehensive descriptions of each fuse and relay function for accurate diagnostics and troubleshooting.
Whether you’re searching for the fuse panel layout, replacing a blown fuse, or diagnosing an electrical issue, this guide is an essential resource. It ensures that your Mercedes-Benz S-Class’s electrical system remains functional and reliable for luxurious long-distance travel, high-performance driving, and daily executive comfort.
Keep your Mercedes-Benz S-Class (2014–2020) in peak condition with this detailed fuse box, fuse panel, and relay guide!
The cigar lighter/power outlet fuses (all are located in the Luggage Compartment Fuse Box) in the Mercedes-Benz S-Class are:
Parking system control unit (Active Parking Assist or code 360-degree camera)
10
401
Trunk lid control control unit
5
402
Rear entertainment controller unit
7.5
403
Spare
–
404
Armrest heater control unit
7.5
405
Sound system amplifier control unit Left front door tweeter control unit Right front door tweeter control unit
7.5
406
Spare
–
407
Spare
–
408
Tuner unit
5
409
360° camera control unit Reversing camera
5
410
Camera cover control unit
5
411
Tire pressure monitor control unit
5
412
Rear seat heater control unit
7.5
413
Left rear display Right rear display
10
414
Rear cellular telephone system antenna amplifier/compensator Rear mobile phone cradle Rear mobile phone contact plate Telephone module with Bluetooth® (SAP profile)
7.5
415
Spare
–
416
Spare
–
417
Trailer recognition control unit
20
418
Spare
–
419
Spare
–
420
DC/AC converter control unit
30
421
Multicontour seat pneumatic pump
30
422
W222: Right rear door control unit
30
423
Spare
–
424
Rear SAM control unit
40
425
Spare
–
426
Bass speaker amplifier
30
427
Armrest heater control unit
20
428
Trailer recognition control unit
15
429
Rear cup holder
10
430
Cigarette lighter with ashtray illumination, rear Cigarette lighter with rear center console illumination Left rear center console socket 12V (ashtray package/smoker package)
15
431
Rear backrest refrigerator box
15
432
Rear SAM control unit
10
433
Ad Blue® control unit
25
434
Ad Blue® control unit
15
435
Ad Blue® control unit
20
436
Rear cup holder
20
437
Spare
–
438
C217 with engine 157: Right exhaust flap actuator motor
7.5
439
C217 with engine 157: Left exhaust flap actuator motor
7.5
440
Spare
–
441
Spare
–
442
Spare
–
443
Spare
–
444
Spare
–
445
Stationary heater radio remote control receiver
5
446
FM 1, AM, CL [ZV] and KEYLESS-GO antenna amplifier
5
447
Hybrid: Battery management system control unit
7.5
448
Spare
–
449
Spare
–
450
Spare
–
451
Trailer socket
15
452
Left rear bumper radar sensor Right rear bumper radar sensor Center rear bumper radar sensor
5
453
Left front bumper radar sensor Right front bumper radar sensor COLLISION PREVENTION ASSIST controller unit
5
454
Ad Blue® control unit Fuel system control unit
5
455
Fully integrated transmission control controller unit
15
456
Spare
–
457
Valid for lithium-ion battery: Starter battery capacitor
7.5
458
Spare
–
459
Spare
–
460
Front cigarette lighter with ashtray illumination
15
461
Right rear center console socket 12V Socket 12V DC/AC converter control unit
15
462
Luggage compartment socket
463
Spare
464
Trailer recognition control unit
20
465
Electric parking brake control unit
30
466
Left front door control unit
30
467
KEYLESS-GO control unit
10
468
Electric parking brake control unit
30
469
Fuel system control unit
25
470
Left rear seat heater control unit Rear seat heater control unit
30
471
Right rear seat heater control unit
30
472
C217, A217: Rear control unit
30
473
Trailer recognition control unit
20
475
Sound system amplifier control unit
40
476
Sound system amplifier control unit
40
477
Active belt buckle control unit C217, A217: Rear control unit
40
478
Left rear seat control unit
30
479
Active belt buckle control unit
40
480
Right rear seat control unit
30
481
Left front reversible emergency tensioning retractor
5
482
W222: MAGIC SKY CONTROL control unit
5
482
C217, A217: MAGIC SKY CONTROL control unit
7.5
483
Right front reversible emergency tensioning retractor
5
484
Right rear seat control unit Left rear seat control unit
7.5
485
Active belt buckle control unit
5
486
Hybrid: Battery management system control unit, Power electronics control unit
10
487
Electric parking brake control unit
5
488
Rear SAM control unit
5
489
Front long-range radar sensor
5
490
Multicontour seat pneumatic pump
5
491
Trunk lid control control unit
40
492
Right front reversible emergency tensioning retractor
40
493
Spare
–
494
Rear SAM control unit
40
495
Rear window heater
40
496
Left front reversible emergency tensioning retractor
40
Relay
S
Vehicle interior circuit 15 relay
T
Rear window heater relay
U
2nd seat row cupholder and sockets relay
V
Ad Blue relay
W
Circuit 15R relay
X
1-st seat row/trunk refrigerator box and sockets relay
Y
Spare relay
Engine Compartment Fuse Box
Fuse box location
It is located in the engine compartment (left-side), under cover.
Fuse box diagram
Assignment of the fuses and relay in the engine compartment
Fuse Data
Full access is available to registered users — log in or register.
Valid for transmission 722.9: Transmission oil auxiliary pump control unit
15
106
Wiper park position heater
25
107
Valid for engine 277, 279: Starter/air pump electrical connection
60
108
Valid for SAE dynamic LED headlamp for right-hand traffic or Dynamic LED headlamp: Left front lamp unit, Right front lamp unit Valid without SAE dynamic LED headlamp for right-hand traffic or Dynamic LED headlamp:: Right front lamp unit
20
109
Wiper motor
30
110
Valid for code SAE dynamic LED headlamp for right-hand traffic or Dynamic LED headlamp: Left front lamp unit, Right front lamp unit Valid without SAE dynamic LED headlamp for right-hand traffic or Dynamic LED headlamp:: Left front lamp unit
20
111
Starter
30
112
Engine fuse and relay module
5
113
Spare
–
114
AIRmatic compressor
40
115
Left fanfare horn Right fanfare horn
15
116
Hybrid: Vacuum pump relay
5
117
Spare
–
118
Hybrid: Electronic Stability Program control unit
5
119
Circuit 87/C2 connector sleeve
15
120
Circuit 87/C1 connector sleeve
7.5
121
Electronic Stability Program control unit
5
122
Hybrid: HYBRID relay
5
123
Night View Assist control unit
5
124
Hybrid: Vehicle interior and engine compartment electrical connector
5
125
Front SAM control unit
5
126
Powertrain control unit Valid for diesel engine: CDI control unit Valid for gasoline engine: ME-SFI [ME] control unit
5
127
Spare
–
128
Exterior lights switch
5
129A
Hybrid: Starter circuit 50 relay
30
129B
Valid except Hybrid: Starter circuit 50 relay
30
Relay
G
Engine compartment circuit 15 relay
H
Starter circuit 50 relay
I
Brake vacuum pump relay
J
Hybrid: HYBRID relay
K
Transmission oil pump relay
L
Horn relay
M
Wiper park position heater relay
N
Circuit 87M relay
O
Valid except Hybrid: Starter circuit 15 relay
P
Secondary air injection relay
Q
Hybrid: Vacuum pump relay
R
AIRmatic relay
Engine Pre-Fuse Box
Fuse box location
Fuse box diagram
View from below
View from above
Engine Pre-Fuse Box
Fuse Data
Full access is available to registered users — log in or register.
ECO start/stop function additional battery Front SAM control unit Electronic ignition lock control unit
10
I1
Spare
–
I11
Spare
–
I7
Front SAM control unit
10
I8
ECO start/stop function additional battery relay connection
–
I5
Hybrid: High-voltage pyrofuse triggered by Supplemental Restraint System control unit
–
I9
Decoupling relay connection
–
F33k1
Decoupling relay
F33k2
ECO start/stop function additional battery relay
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