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

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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 functionAmp
200Front SAM control unit40
201Front SAM control unit40
202Alarm siren5
203W222: Driver seat heater control unit30
204Diagnostic connector5
205Electronic ignition lock control unit7.5
206Analog clock5
207Climate control control unit20
208Instrument cluster7.5
209Front climate control operating unit5
210Steering column tube module control unit10
211Spare-
212Spare-
213Electronic Stability Program control unit25
214Spare-
215Spare-
216Spare-
217Japanese version: Dedicated Short-Range Communications control unit5
218Supplemental restraint system control unit5
219Weight sensing system (WSS) control unit
Front passenger seat occupied recognition and ACSR
5
Relay
DMAGIC VISION CONTROL relay
EBackup relay
FRelay, 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-...)

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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 functionAmp
1Circuit 30 "E1" connection
2Circuit 30g "E2" connection
301Mirror taximeter5
302Right front door control unit30
303W222: Left rear door control unit
C217, A217: Rear control unit
30
304W222: Right rear door control unit
C217, A217: Rear control unit
30
305Driver seat control unit30
306Front passenger seat control unit30
307W222: Intelligent servo module for DIRECT SELECT20
307C217, A217: Driver seat heater control unit30
308Front passenger seat heater control unit30
309Emergency call system control unit
Telematics services communications module
HERMES control unit
5
310Stationary heater control unit25
311Rear blower motor10
312Overhead control panel control unit10
313Hybrid and Hybrid Plus: Power electronics control unit10
314A217: Antitheft alarm system (designation in coordination)7.5
315Powertrain control unit
Valid for gasoline engine: ME-SFI control unit
Valid for engine 642, 651: CDI control unit
10
316Spare-
317W222: Panoramic sliding sunroof control module
C217, A217: MAGIC SKY CONTROL control unit
30
318Audio/COMAND display15
319Panoramic sliding sunroof control module
C217, A217: Panoramic roof roller sun blind control module
30
320Active Body Control control unit
AIRmatic control unit (Valid except Active Body Control)
15
321C217, A217: Intelligent servo module for DIRECT SELECT20
322COMAND controller unit15
323Supplemental Restraint System control unit7.5
MF1/1Japan version: Dedicated Short-Range Communications control unit7.5
MF1/2Mono multifunction camera
Stereo multifunction camera
7.5
MF1/3Rain/light sensor with additional functions
Overhead control panel control unit
7.5
MF1/4Driver seat control unit7.5
MF1/5Front passenger seat control unit7.5
MF1/6Steering column tube module control unit7.5
MF2/1Perfume atomizer generator5
MF2/2Audio/COMAND control panel
Touchpad
5
MF2/3Electronic Stability Program control unit5
MF2/4Heads-up display5
MF2/5Hybrid and Hybrid Plus: Electrical refrigerant compressor5
MF2/6Spare-
MF3/1Front SAM control unit5
MF3/2Radar sensors control unit5
MF3/3COMAND fan motor5
MF3/4Driver side instrument panel button group
Center instrument panel button group
5
MF3/5Rear air conditioning operating unit5
MF3/6as of 01.06.2016: Antenna changeover switch for telephone and stationary heater5

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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-...)

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Assignment of the fuses and relay in the luggage compartment
Fused functionAmp
1Circuit 30 "E1" connection
2Circuit 30g "E2" connection
400Parking system control unit (Active Parking Assist or code 360-degree camera)10
401Trunk lid control control unit5
402Rear entertainment controller unit7.5
403Spare-
404Armrest heater control unit7.5
405Sound system amplifier control unit
Left front door tweeter control unit
Right front door tweeter control unit
7.5
406Spare-
407Spare-
408Tuner unit5
409360° camera control unit
Reversing camera
5
410Camera cover control unit5
411Tire pressure monitor control unit5
412Rear seat heater control unit7.5
413Left rear display
Right rear display
10
414Rear cellular telephone system antenna amplifier/compensator
Rear mobile phone cradle
Rear mobile phone contact plate
Telephone module with Bluetooth® (SAP profile)
7.5
415Spare-
416Spare-
417Trailer recognition control unit20
418Spare-
419Spare-
420DC/AC converter control unit30
421Multicontour seat pneumatic pump30
422W222: Right rear door control unit30
423Spare-
424Rear SAM control unit40
425Spare-
426Bass speaker amplifier30
427Armrest heater control unit20
428Trailer recognition control unit15
429Rear cup holder10
430Cigarette lighter with ashtray illumination, rear
Cigarette lighter with rear center console illumination
Left rear center console socket 12V (ashtray package/smoker package)
15
431Rear backrest refrigerator box15
432Rear SAM control unit10
433Ad Blue® control unit25
434Ad Blue® control unit15
435Ad Blue® control unit20
436Rear cup holder20
437Spare-
438C217 with engine 157: Right exhaust flap actuator motor7.5
439C217 with engine 157: Left exhaust flap actuator motor7.5
440Spare-
441Spare-
442Spare-
443Spare-
444Spare-
445Stationary heater radio remote control receiver5
446FM 1, AM, CL [ZV] and KEYLESS-GO antenna amplifier5
447Hybrid: Battery management system control unit7.5
448Spare-
449Spare-
450Spare-
451Trailer socket15
452Left rear bumper radar sensor
Right rear bumper radar sensor
Center rear bumper radar sensor
5
453Left front bumper radar sensor
Right front bumper radar sensor
COLLISION PREVENTION ASSIST controller unit
5
454Ad Blue® control unit Fuel system control unit5
455Fully integrated transmission control controller unit15
456Spare-
457Valid for lithium-ion battery: Starter battery capacitor7.5
458Spare-
459Spare-
460Front cigarette lighter with ashtray illumination15
461Right rear center console socket 12V
Socket 12V
DC/AC converter control unit
15
462Luggage compartment socket
463Spare
464Trailer recognition control unit20
465Electric parking brake control unit30
466Left front door control unit30
467KEYLESS-GO control unit10
468Electric parking brake control unit30
469Fuel system control unit25
470Left rear seat heater control unit
Rear seat heater control unit
30
471Right rear seat heater control unit30
472C217, A217: Rear control unit30
473Trailer recognition control unit20
475Sound system amplifier control unit40
476Sound system amplifier control unit40
477Active belt buckle control unit
C217, A217: Rear control unit
40
478Left rear seat control unit30
479Active belt buckle control unit40
480Right rear seat control unit30
481Left front reversible emergency tensioning retractor5
482W222: MAGIC SKY CONTROL control unit5
482C217, A217: MAGIC SKY CONTROL control unit7.5
483Right front reversible emergency tensioning retractor5
484Right rear seat control unit
Left rear seat control unit
7.5
485Active belt buckle control unit5
486Hybrid: Battery management system control unit, Power electronics control unit10
487Electric parking brake control unit5
488Rear SAM control unit5
489Front long-range radar sensor5
490Multicontour seat pneumatic pump5
491Trunk lid control control unit40
492Right front reversible emergency tensioning retractor40
493Spare-
494Rear SAM control unit40
495Rear window heater40
496Left front reversible emergency tensioning retractor40
Relay
SVehicle interior circuit 15 relay
TRear window heater relay
U2nd seat row cupholder and sockets relay
VAd Blue relay
WCircuit 15R relay
X1-st seat row/trunk refrigerator box and sockets relay
YSpare relay

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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-...)

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Assignment of the fuses and relay in the engine compartment
Fused functionAmp
100Hybrid: Vacuum pump40
101Connector sleeve, circuit 87/215
102Connector sleeve, circuit 87/220
103Connector sleeve, circuit 87M415
104Connector sleeve, circuit 87M315
105Valid for transmission 722.9: Transmission oil auxiliary pump control unit15
106Wiper park position heater25
107Valid for engine 277, 279: Starter/air pump electrical connection60
108Valid 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
109Wiper motor30
110Valid 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
111Starter30
112Engine fuse and relay module5
113Spare-
114AIRmatic compressor40
115Left fanfare horn
Right fanfare horn
15
116Hybrid: Vacuum pump relay5
117Spare-
118Hybrid: Electronic Stability Program control unit5
119Circuit 87/C2 connector sleeve15
120Circuit 87/C1 connector sleeve7.5
121Electronic Stability Program control unit5
122Hybrid: HYBRID relay5
123Night View Assist control unit5
124Hybrid: Vehicle interior and engine compartment electrical connector5
125Front SAM control unit5
126Powertrain control unit
Valid for diesel engine: CDI control unit
Valid for gasoline engine: ME-SFI [ME] control unit
5
127Spare-
128Exterior lights switch5
129AHybrid: Starter circuit 50 relay30
129BValid except Hybrid: Starter circuit 50 relay30
Relay
GEngine compartment circuit 15 relay
HStarter circuit 50 relay
IBrake vacuum pump relay
JHybrid: HYBRID relay
KTransmission oil pump relay
LHorn relay
MWiper park position heater relay
NCircuit 87M relay
OValid except Hybrid: Starter circuit 15 relay
PSecondary air injection relay
QHybrid: Vacuum pump relay
RAIRmatic relay

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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 functionAmp
1Connection, circuit 30 "B1"
2Connection, circuit 30 unlatched "B2"
M3Hybrid: Electrical machine500
M3Valid except Hybrid: Alternator500
M1Hybrid: Electrical machine-
M1Valid except Hybrid: Starter-
MR5Electrical power steering control unit100
MR2Fan motor100
M4Hybrid: Fully integrated transmission control controller unit100
I1Spare-
M2Valid for diesel engine: Glow output stage150
MR1Motor fuse and relay module60
MR3Spare-
MR4Valid for engine 277, 279: Fan motor150
I2Spare-

Interior Pre-fuse Box

Interior Pre-fuse Box
Fused functionAmp
I7Right A-pillar fuse box125
I2Left fuse and relay module125
C2Spare-
I8Spare-
I9Spare-
I3No-load current shutoff relay connection-
C1Blower regulator40
I1Electronic Stability Program control unit40
I4Spare-
I6Rear fuse and relay module60
I5Right A-pillar fuse box60
F32/4k2Quiescent current cutout relay

Rear Pre-fuse Box

Rear Pre-fuse Box
Fused functionAmp
I3Spare-
I2Windshield heater control unit125
I7Hybrid: High-voltage disconnect device7.5
I4Rear fuse and relay module150
I6ECO start/stop function additional battery200
I7ECO start/stop function additional battery
Front SAM control unit
Electronic ignition lock control unit
10
I1Spare-
I11Spare-
I7Front SAM control unit10
I8ECO start/stop function additional battery relay connection-
I5Hybrid: High-voltage pyrofuse triggered by Supplemental Restraint System control unit-
I9Decoupling relay connection-
F33k1Decoupling relay
F33k2ECO start/stop function additional battery relay