Mercedes-Benz S-Class (W222/C217/A217; 2014-2019…) fuses and relays

 

In this article, we consider the sixth-generation Mercedes-Benz S-Class (W222, C217, A217), available from 2014 to the present. Here you will find fuse box diagrams of Mercedes-Benz S300, S350, S400, S450, S500, S550, S560, S600, S650, S63, S65 2014, 2015, 2016, 2017, 2018 and 2019, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse Layout Mercedes-Benz S-Class 2014-2019…


Cigar lighter (power outlet) fuses in the Mercedes-Benz S-Class are the fuses #430, #460, #461 and #462 in the Luggage Compartment Fuse Box.


Instrument Panel Fuse Box

Fuse box location

The fuse box is located on the left side of the instrument panel, behind the cover.The location of the fuses in the dashboard: Mercedes-Benz S-Class (2014-2019-...)

Fuse box diagram

Instrument panel fuse box diagram: Mercedes-Benz S-Class (2014-2019-...)


 

Assignment of the fuses and relay in the instrument panel

Fused function Amp
200 Front SAM control unit 40
201 Front SAM control unit 40
202 Alarm siren 5
203 W222: Driver seat heater control unit 30
204 Diagnostic connector 5
205 Electronic ignition lock control unit 7.5
206 Analog clock 5
207 Climate control control unit 20
208 Instrument cluster 7.5
209 Front climate control operating unit 5
210 Steering column tube module control unit 10
211 Spare
212 Spare
213 Electronic Stability Program control unit 25
214 Spare
215 Spare
216 Spare
217 Japanese version: Dedicated Short-Range Communications control unit 5
218 Supplemental restraint system control unit 5
219 Weight sensing system (WSS) control unit
Front passenger seat occupied recognition and ACSR
5
Relay
D MAGIC VISION CONTROL relay
E Backup relay
F Relay, circuit 15R

Fuse box in the front-passenger footwell

Fuse box location

Fuse box in the front-passenger footwell: Mercedes-Benz S-Class (2014-2019-...)

Fuse box diagram

Fuse box in the front-passenger footwell: Mercedes-Benz S-Class (2014-2019-...)

Assignment of the fuses in the in the front-passenger footwell

Fused function Amp
1 Circuit 30 “E1” connection
2 Circuit 30g “E2” connection
301 Mirror taximeter 5
302 Right front door control unit 30
303 W222: Left rear door control unit
C217, A217: Rear control unit
30
304 W222: Right rear door control unit
C217, A217: Rear control unit
30
305 Driver seat control unit 30
306 Front passenger seat control unit 30
307 W222: Intelligent servo module for DIRECT SELECT 20
307 C217, A217: Driver seat heater control unit 30
308 Front passenger seat heater control unit 30
309 Emergency call system control unit
Telematics services communications module
HERMES control unit
5
310 Stationary heater control unit 25
311 Rear blower motor 10
312 Overhead control panel control unit 10
313 Hybrid and Hybrid Plus: Power electronics control unit 10
314 A217: Antitheft alarm system (designation in coordination) 7.5
315 Powertrain control unit
Valid for gasoline engine: ME-SFI control unit
Valid for engine 642, 651: CDI control unit
10
316 Spare
317 W222: Panoramic sliding sunroof control module
C217, A217: MAGIC SKY CONTROL control unit
30
318 Audio/COMAND display 15
319 Panoramic sliding sunroof control module
C217, A217: Panoramic roof roller sun blind control module
30
320 Active Body Control control unit
AIRmatic control unit (Valid except Active Body Control)
15
321 C217, A217: Intelligent servo module for DIRECT SELECT 20
322 COMAND controller unit 15
323 Supplemental Restraint System control unit 7.5
MF1/1 Japan version: Dedicated Short-Range Communications control unit 7.5
MF1/2 Mono multifunction camera
Stereo multifunction camera
7.5
MF1/3 Rain/light sensor with additional functions
Overhead control panel control unit
7.5
MF1/4 Driver seat control unit 7.5
MF1/5 Front passenger seat control unit 7.5
MF1/6 Steering column tube module control unit 7.5
MF2/1 Perfume atomizer generator 5
MF2/2 Audio/COMAND control panel
Touchpad
5
MF2/3 Electronic Stability Program control unit 5
MF2/4 Heads-up display 5
MF2/5 Hybrid and Hybrid Plus: Electrical refrigerant compressor 5
MF2/6 Spare
MF3/1 Front SAM control unit 5
MF3/2 Radar sensors control unit 5
MF3/3 COMAND fan motor 5
MF3/4 Driver side instrument panel button group
Center instrument panel button group
5
MF3/5 Rear air conditioning operating unit 5
MF3/6 as of 01.06.2016: Antenna changeover switch for telephone and stationary heater 5

Luggage Compartment Fuse Box

Fuse box location

It is located on the right side of the luggage compartment, behind the lid.The location of the fuses in the trunk: Mercedes-Benz S-Class (2014-2019-...)

Fuse box diagram

Trunk fuse box diagram: Mercedes-Benz S-Class (2014-2019-...)

 

Assignment of the fuses and relay in the luggage compartment

Fused function Amp
1 Circuit 30 “E1” connection
2 Circuit 30g “E2” connection
400 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.The location of the fuses in the engine compartment: Mercedes-Benz S-Class (2014-2019-...)

Fuse box diagram

Under-hood fuse box diagram: Mercedes-Benz S-Class (2014-2019-...)

 

Assignment of the fuses and relay in the engine compartment

Fused function Amp
100 Hybrid: Vacuum pump 40
101 Connector sleeve, circuit 87/2 15
102 Connector sleeve, circuit 87/2 20
103 Connector sleeve, circuit 87M4 15
104 Connector sleeve, circuit 87M3 15
105 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

Engine Pre-Fuse Box: Mercedes-Benz S-Class (2014-2019-...)

View from below

View from above

Engine Pre-Fuse Box

Fused function Amp
1 Connection, circuit 30 “B1”
2 Connection, circuit 30 unlatched “B2”
M3 Hybrid: Electrical machine 500
M3 Valid except Hybrid: Alternator 500
M1 Hybrid: Electrical machine
M1 Valid except Hybrid: Starter
MR5 Electrical power steering control unit 100
MR2 Fan motor 100
M4 Hybrid: Fully integrated transmission control controller unit 100
I1 Spare
M2 Valid for diesel engine: Glow output stage 150
MR1 Motor fuse and relay module 60
MR3 Spare
MR4 Valid for engine 277, 279: Fan motor 150
I2 Spare

Interior Pre-fuse Box

Interior Pre-fuse Box

Fused function Amp
I7 Right A-pillar fuse box 125
I2 Left fuse and relay module 125
C2 Spare
I8 Spare
I9 Spare
I3 No-load current shutoff relay connection
C1 Blower regulator 40
I1 Electronic Stability Program control unit 40
I4 Spare
I6 Rear fuse and relay module 60
I5 Right A-pillar fuse box 60
F32/4k2 Quiescent current cutout relay

Rear Pre-fuse Box

Rear Pre-fuse Box

Fused function Amp
I3 Spare
I2 Windshield heater control unit 125
I7 Hybrid: High-voltage disconnect device 7.5
I4 Rear fuse and relay module 150
I6 ECO start/stop function additional battery 200
I7 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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