Mercedes W222 fuse and relay

Mercedes-Benz W222 is the sixth generation of the S-class series of the German brand Mercedes-Benz which was produced in 2013, 2014, 2015, 2016, 2017, 2018, 2019 and 2020 with the designation S300, S350, S400, S450, S500 Hybrid, S550, S560, S600, S650, S63, S65 AMG 4MATIC in C217 coupe and A217 convertible. During this time, the model has been restyled. A separate series of Mercedes w222 is also known under the Mercedes-Maybach brand as part of the revival of the Maybach brand. In this publication you will find a description of the fuses and relays Mercedes 222 with box diagrams and their locations. Select the cigarette lighter fuse.

Mercedes w222

The execution of the boxes and the purpose of the elements in them may differ from those presented and depend on the year of manufacture and the level of electrical equipment, check the information with your diagrams.

Brochure example with designation

designation

Passenger compartment

Box in the dashboard

A box with fuses and relays is installed in the left end of the dashboard behind a protective cover.

location fuse box mercedes w222

Diagram

Diagram mercedec w222

Assignment

20040A Front SAM control unit
20140A Front SAM control unit
2025A Alarm Siren
20330A W222: Driver seat heater control unit.
2045A Diagnostic connector
2057.5A Electronic ignition lock control unit
2065A Analog clock
20720A Climate control unit
2087.5A Instrument panel
2095A Front climate control unit
21010A Steering column tube module control unit
211Spare
212Spare
21325A Electronic stabilization system control unit
214Spare
215Spare
216Spare
2175A Japanese version: special control unit for short range communication system
2185A Secondary restraint system control unit
2195A Weight measurement system (WSS) control unit
Front passenger seat occupied recognition and ACSR
22015A MAGIC VISION CONTROL Relay
Relay
DMAGIC VISION CONTROL relay
EBackup relay
FRelay circuit 15R

Fuse box under the panel

On the right pillar, under the instrument panel, there is a fuse box.

Photo example

Photo - example

Diagram

Diagram mercedes 222

Designation

3015A Mirror Taximeter
30230A Front right door control unit
30330A W222: Left rear door control unit.
C217, A217: Rear control box
30430A W222: Rear right door control unit.
C217, A217: Rear control box
30530A Driver’s seat control unit
30630A Front passenger seat control unit
30720A W222: Intelligent servo module for DIRECT SELECT
30A C217, A217: Driver seat heater control unit.
30830A Front passenger seat heater control unit
3095A Emergency call system control unit
Telematic services communication module
HERMES control unit
31025A Stationary heater control unit
31110A Rear fan motor
31210A Overhead control box
31310A Hybrid and Hybrid Plus: power electronics control unit
3147.5A A217: Anti-theft alarm (designation by agreement)
31510A Transmission control unit
Valid for petrol engine: ME-SFI control unit
Valid for engines 642, 651: CDI control unit
316Spare
31730A W222: Panoramic sliding sunroof control unit.
C217, A217: MAGIC SKY CONTROL control unit
31815A Audio/display COMAND
31930A Panoramic sliding sunroof control unit
C217, A217: Panoramic sunblind control module.
32015A Active Body Control
AIRmatic control unit (valid except for Active Body Control)
32120A C217, A217: Intelligent servo module for DIRECT SELECT
32215A COMAND control unit
3237.5A Secondary restraint system control unit
MF1 / 17.5A Japan version: special control unit for short range communication system
MF1 / 27.5A Monochrome multifunctional camera
Multifunctional stereo camera
MF1 / 37.5A Rain/light sensor with additional functions
Overhead control panel control box
MF1 / 47.5A Driver’s seat control unit
MF1 / 57.5A Front passenger seat control unit
MF1 / 67.5A Steering column tube module control unit
MF2 / 15A Perfume atomizer generator
MF2 / 25A Audio / COMAND control panel
5A Touch panel
MF2 / 35A Control unit for electronic stabilization system
MF2 / 45A Head-up display
MF2 / 55A Hybrid and Hybrid Plus: electric refrigerant compressor
MF2 / 6Spare
MF3 / 15A Front SAM control unit
MF3 / 25A Radar sensors control unit
MF3 / 35A Fan motor COMAND
MF3 / 45A Group of buttons on the instrument panel on the driver’s side
Group of buttons on the central instrument panel
MF3 / 55A Rear air conditioner control unit
MF3 / 65A from 06/01/2016: Antenna switch for telephone and stationary heater

Power fuse box

It is also installed under the panel, under the interior trim, at the feet of the front passenger.

location 3

Photo

Photo 3

Diagram

Diagram 3

Allocation

I7125A Fuse box in the right A-pillar
I2125A Left fuse and relay module
C2Spare
I8Spare
I9Spare
I3Connection of the relay of shutdown of current of idling
C140A Blower regulator
I140A Electronic stabilization system control unit
I4Spare
I660A Rear fuse and relay module
I560A Fuse box in the right A-pillar
F32 / 4k2Relay for quiescent current interruption

Luggage compartment

Fuse and relay box

In the luggage compartment on the right side is the main fuse and relay box.

photo 4

Diagram

Diagram 4

Appointment

  1. Connection circuit 30 “E1”
  2. Circuit connection 30g “E2”
40010A Parking control module (Active Parking Assist or 360 code camera)
4015A Trunk lid control unit
4027.5A Rear entertainment control unit
403Spare
4047.5A Armrest heater control unit
4057.5A Sound system amplifier control unit
Front left door tweeter control unit
Front right door tweeter control unit
406Spare
407Spare
4085A Tuner box
4095A 360° camera control unit
Rear View Camera
4105A Camera cover control unit
4115A Tire pressure sensor control unit
4127.5A Rear seat heater control unit
41310A Left rear display
Right rear display
4147.5A Rear cell phone antenna booster/compensator
Cell phone stand on the back
Rear mobile phone contact plate
Bluetooth telephone module (SAP profile)
415Spare
416Spare
41720A Trailer recognition control unit
418Spare
419Spare
42030A DC/AC converter control unit
42130A Pneumatic pump with multi-contour seat
42230A W222: Rear right door control unit.
423Spare
42440A Rear control unit SAM
425Spare
42630A Bass speaker amplifier
42720A Armrest heater control unit
42815A Trailer recognition control unit
42910A Rear cup holder
430Cigarette lighter with ashtray light, rear
15A Illuminated cigarette lighter rear center console
Socket on the center console left, rear, 12V (ashtray bag / smoker bag)
43115A Refrigerator in the back
43210A Rear control unit SAM
43325A AdBlue control unit
43415A AdBlue control unit
43520A AdBlue control unit
43620A Rear cup holder
437Spare
4387.5A C217 with engine 157: Right exhaust flap motor.
4397.5A C217 with engine 157: Left exhaust flap motor.
440Spare
441Spare
442Spare
443Spare
444Spare
4455A Stationary heater radio control receiver
4465A Antenna amplifier FM 1, AM, CL [ZV] and KEYLESS-GO
4477.5A Hybrid: Battery Management System Control Unit
448Spare
449Spare
450Spare
45115A Trailer socket
4525A Rear bumper radar sensor, left
Rear bumper radar sensor, right
Rear Bumper Central Radar Sensor
4535A Front bumper radar sensor, left
Radar sensor front bumper right
COLLISION PREVENTION ASSIST control unit
4545A AdBlue control unit
Fuel system control unit
45515A Fully integrated transmission control unit
456Spare
4577.5A Valid for lithium-ion battery: starter battery capacitor
458Spare
459Spare
46015A Front cigarette lighter with ashtray light
46115A Right rear center console socket 12V
Socket 12V
AC/DC converter control unit
46215A Socket for luggage compartment
463Spare
46420A Trailer recognition control unit
46530A Electric parking brake control unit
46630A Front left door control unit
46710A KEYLESS-GO control box
46830A Electric parking brake control unit
46925A Fuel system control unit
47030A Rear left seat heater control unit
Rear seat heater control unit
47130A Rear right seat heater control unit
47230A C217, A217: Rear control box
47320A Trailer recognition control unit
47540A Sound system amplifier control unit
47640A Sound system amplifier control unit
47740A Active belt buckle control unit
C217, A217: Rear control box
47830A Left rear seat control unit
47940A Active belt buckle control unit
48030A Right rear seat control unit
4815A Reversible Front Left Emergency Tension Retractor
4825A W222: MAGIC SKY CONTROL control unit
7.5A C217, A217: MAGIC SKY CONTROL control unit
4835A Reversible emergency tensioner retractor front right
4847.5A Right rear seat control unit
Left rear seat control unit
4855A Active belt buckle control unit
48610A Hybrid:
Battery management system control unit
Power electronics control unit
4875A Electric parking brake control unit
4885A Rear control unit SAM
4895A Front long range radar sensor
4905A Pneumatic pump with multi-contour seat
49140A Trunk lid control unit
49240A Emergency Tension Reversible Retractor Front Right
493Spare
49440A Rear control unit SAM
49540A Heated rear window
49640A Reversible Front Left Emergency Tension Retractor
Relay
SRelay circuit 15 car interior
ТRear defroster relay
U2nd row of seats cup holder and relay sockets
VAdblue relay
WCircuit relay 15R
XRelay for refrigerator and sockets of the 1st row of seats / trunk
YSpare relay

Fuses numbered 430, 460 and 461 are responsible for the operation of the cigarette lighters.

Power fuse box

Another power fuse box is installed on the back of the rear seat, next to the amplifier.

photo 2

Diagram

Diagram 5

Decoding

I3Spare
I2125A Windshield heater control unit
I77.5A Hybrid: high voltage disconnect device
I4150A Rear fuse and relay module
I6200A Extra battery ECO start/stop
I710A Extra battery ECO start/stop
Front SAM control unit
Electronic ignition lock control unit
I1Spare
I11Spare
I710A Front SAM control unit
I8ECO start / stop function connection of additional battery relay
I5Hybrid: high voltage pyroelectric fuse triggered by the secondary restraint system control unit
I9Connecting the decoupling relay
F33k1Decoupling relay
F33k2ECO start/stop function optional battery relay

Some additional protection elements can also be attached to the battery terminals.

Battery

Boxes under the hood

Under the hood of the Mercedes w222, there are 2 fuse boxes (left and right). To access, remove the protective cover.

location 5

Fuse and relay box

Located on the left side of the engine compartment.

location 6

Diagram

Diagram mercedes w222

Assignment

10040A Hybrid: vacuum pump
10115A Coupling, circuit 87/2
10220A Coupling, circuit 87/2
10315A Chain coupler 87M4
10415A Chain coupler 87M3
10515A For gearbox 722.9: Auxiliary transmission oil pump control unit
10625A Wiper park position heater
10760A Valid for engines 277, 279: Electrical connection for starter/air pump
10820A Valid for SAE dynamic LED headlight for right-hand traffic or dynamic LED headlight:
Front left lamp unit
Front right lamp unit
Valid without SAE Dynamic LED Headlight for Right Hand Traffic or Dynamic LED Headlight:
Front right lamp unit
10930A Wiper Motor
11020A Valid for dynamic LED headlight with SAE code for right-hand traffic or dynamic LED headlight:
Front left lamp unit
Front right lamp unit
Valid without SAE Dynamic LED Headlight for Right Hand Traffic or Dynamic LED Headlight:
Front left lamp unit
11130A Starter
1125A Engine fuse and relay module
113Spare
11440A AIRmatic compressor
11515A Left Horn Fanfare
Right fanfare horn
1165A Hybrid: vacuum pump relay
117Spare
1185A Hybrid: electronic stabilization control unit
11915A Chain coupler 87 / C2
1207.5A Chain coupler 87 / C1
1215A Control unit for electronic stabilization system
1225A Hybrid: HYBRID relay
1235A Night View Assist control unit
1245A Hybrid: car interior and engine compartment electrical connector
1255A Front SAM control unit
1265A Transmission control unit
Valid for diesel engine: CDI control unit
Valid for petrol engine: Control unit ME-SFI [ME]
127Spare
1285A Outdoor light switch
129A30A Hybrid: Starter Circuit Relay 50
129B30A Valid except hybrid: starter circuit relay 50
Relay
GCircuit 15 relay in engine compartment
HStarter circuit relay 50
IBrake vacuum pump relay
JHybrid: HYBRID relay
KTransmission oil pump relay
LHorn relay
MWiper park position heater relay
NCircuit relay 87M
ОValid except hybrid: starter circuit 15 relay
PSecondary air injection relay
QHybrid: vacuum pump relay
RAIRmatic relay

Power fuse box

Installed on the right side of the engine compartment.

location 7

Diagram

Diagram

Designation

  1. Connection, circuit 30 “B1”
  2. Connection, circuit 30 momentary “B2”
M3500A Hybrid: electric machine
500A Valid except Hybrid: Alternator
M1Hybrid: electric car
Valid except Hybrid: Starter
MR5100A Electric power steering control unit
MR2100A fan motor
M4100A Hybrid: fully integrated transmission control unit
I1Spare
M2150A Valid for diesel engine: Glow output stage
MR160A Engine fuse and relay module
MR3Spare
MR4150A Valid for motors 277, 279: Fan motor
I2Spare

 

That’s all. And if you have something to add – write in the comments.

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