MB CLS-Class (C257) | 2019-2023

Check Mercedes-Benz CLS-Class fuse box diagrams for 2019–2023 models with fuse locations, panel layouts, and detailed electrical system information for petrol, diesel, and AMG variants. This article covers the third-generation Mercedes-Benz CLS-Class (Model Code: C257), available from 2019, and includes fuse box diagrams for Mercedes-Benz CLS350, CLS450, CLS53 AMG, CLS220d, CLS300d, CLS350d and CLS400d (2019, 2020, 2021, 2022 and 2023), along with details about the location of the fuse panels inside the vehicle and a clear explanation of the assignment of each fuse (fuse layout).

Engine Compartment

Fuse Box Location

Fuse box located on the driver side in the engine compartment. To reach it: turn the clips (2) on the engine cover (1) a quarter turn to the left, then remove the cover in the direction of the arrow. Unscrew the screws (4) and remove the fuse box cover (3).

Fuse Box Diagram

Fuses

Assignment of the fuses in the engine compartment

Fuse Data
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No.AmpsDescription
100—Spare
10115AEngine 256: Circuit 87M end sleeve (Z7/48z1)
Engine 264: Fuel tank diagnostic module (A101)
Engine 654, 656: CDI control unit (N3/9)
10220AEngine 654, 656: CDI control unit (N3/9)
Engine 177, 256, 264: ME-SFI (ME) control unit (N3/10)
10315AEngine 654, 656: CDI control unit (N3/9)
Engine 264, 256: ME-SFI (ME) control unit (N3/10)
Model 257 with code U79 (BlueTEC (SCR) diesel exhaust gas cleaning, Generation 3): NOx sensor control unit downstream of SCR catalytic converter (N37/8), NOx sensor control unit upstream of diesel oxidation catalytic converter (N37/12)
Engine 177: Fuel tank diagnostic module (A101), Oil sensor (oil level, temperature and quality) (B40), Coolant thermostat heating element (R48), Left thrust circulating air switchover valve (Y101/1), Right thrust circulating air switchover valve (Y101/2), Engine oil pump valve (Y130)
10415AEngine 654, 656: CDI control unit (N3/9) Circuit 87M end sleeve (Z7/75z1)
Engine 177: Ignition coil, cylinders 5+6 (T4/2), Ignition coil, cylinders 7+8 (T4/3), Left intake camshaft solenoid (Y49/4), Left exhaust camshaft solenoid (Y49/6)
Engine 256: ME-SFI (ME) control unit (N3/10)
Engine 264: Potential distributor 2 power supply (X30/90)
105—–
106—–
107—–
108—–
109—–
11020AModel 257 with code 631 (LED static headlamp, left-hand traffic) or code 632 (LED static headlamp, right-hand traffic): Right front lamp unit (E2)
With CODE 640 (High Performance LED) or CODE 641 (Dynamic left-hand traffic LED headlamp) or CODE 642 (Dynamic righthand traffic LED headlamp): Left front lamp unit (E1), Right front lamp unit (E2)
11130AWiper motor (M6/1)
112—Spare
11330AExcept code B01 (48V technology): Starter (M1)
11420A / 40AModel 257 with code 489 (AIR BODY CONTROL) (40A): AIR BODY CONTROL compressor (A9/1)
Model 290 with engine 177 (20A): Low-temperature circuit circulation pump 1 (M43/6), Low-temperature circuit circulation pump 3 (M43/8)
115—Spare
116—Spare
1177.5AEngine 256: Electric refrigerant compressor (A9/5)
11815ALow-temperature circuit circulation pump 1 (M43/6)
Engine 256: Low-temperature circuit switchover valve (Y73/1)
Model 290 with engine 177: Circuit 87C end sleeve (Z141/2z1)
11915APowertrain control unit (N127), Fan motor (M4/7)
Engine 256, 264: Low temperature circuit circulation pump 2 (M43/7)
Model 257 with code 2U1 (Radiator shutters): Upper radiator trim flap actuator motor (M2/38), Lower radiator trim flap actuator motor (M2/39)
Model 290 with code U78 (AMG Sport exhaust system): Left exhaust flap actuator motor (M16/53), Right exhaust flap actuator motor (M16/54), Exhaust flap center actuator motor (M16/55)
Model 257 with code U21 (AMG performance exhaust system): Left exhaust flap actuator motor (M16/53)
1205AWith code 597 (Windshield, heated) and code B01 (48V technology): Windshield heater control unit (N61)
12110APark pawl capacitor (C8)
1225AModel 290 with code 467 (Electronic locking differential): Electric differential lock control unit (N3/2)
1235AFront SAM control unit (N10/6)
124—Spare
1255APowertrain control unit (N127)
With code B01 (48V technology): 48 V on-board electrical system battery (G1/3)
Engine 654, 656: CDI control unit (N3/9)
Engine 256, 264: ME-SFI (ME) control unit (N3/10)
Engine 177: Drive Unit control unit (N145/1)
With code M005 (4MATIC): All-wheel drive control unit (N45)
126—Spare
1275AExcept code B01 (48V technology): Voltage dip limiter (R62)
1285AExterior lights switch (S1)
1295AElectronic Stability Program control unit (N30/4)
130—Spare
131—–
1325AModel 257 with code 489 (AIR BODY CONTROL): AIR BODY CONTROL control unit (N51/3)
13320AModel 257 with code 631 (LED static headlamp, left-hand traffic) or code 632 (LED static headlamp, right-hand traffic): Left front lamp unit (E1)
With CODE 640 (High Performance LED) or CODE 641 (Dynamic left-hand traffic LED headlamp) or CODE 642 (Dynamic righthand traffic LED headlamp): Left front lamp unit (E1), Right front lamp unit (E2)

Passenger Compartment (Left)

Fuse Box Location

The fuse panel is located on the driver’s side, at the edge of the instrument panel, behind the side cover.

Fuse Box Diagram

Fuses

Assignment of the fuses in the instrument panel on the driver’s side

Fuse Data
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No.AmpsDescription
20040AFront SAM control unit (N10/6)
20140AFront SAM control unit (N10/6)
2025AEngine 256: Starter-alternator control unit (N129)
Engine 264 with code B01 (48V technology): Starter alternator (M1/10)
20330ALHD vehicles: Left front door control unit (N69/1)
RHD vehicles: Right front door control unit (N69/2)
2045AWith code 498 (Japan version) or code 835 (Additional parts for South Korea vehicles): Dedicated Short-Range Communications control unit (A50/6)
With code 320 (Pre-installation of single CD drive): External CD drive (A2/132)
2057.5ASteering column tube module control unit (N80)
2065AWith code 246 (Analog clock): Analog clock (A70/1)
With code 897 (Wireless mobile phone charging) or with code 899 (Multifunction telephony): USB port on center console at front (X115/5)
207—Spare
2087.5AAudio/COMAND display (A40/8)
With code 464 (Full display digital instrument cluster): Digital instrument cluster full display fan motor (M4/12)
2095AUpper control panel control unit (N72/1), Climate control operating unit (N58/1)
21015AClimate control control unit (N22/1)
21115ASteering column tube module control unit (N80)
2125AWith code B24 (Remote control for stationary heater) or code 503 (Pre-installation for Remote Parking Pilot) and code 380 (Car telephony package) or code 899 (Multifunction telephony): Telephone and Active Parking Assist/stationary heater antenna changeover switch (A2/155)
21330ALHD vehicles: Left front reversible emergency tensioning retractor (A76)
RHD vehicles: Right front reversible emergency tensioning retractor (A76/1)
21430ALHD vehicles: Left rear door control unit (N69/3)
RHD vehicles: Right rear door control unit (N69/4)

Passenger Compartment (Right)

Fuse Box Location

The fuse box is located on the passenger side, to the right of the footrest, beneath the cover. To reach it: fold the cover (1) back and take it off.

Fuse Box Diagram

Fuses

Assignment of the fuses in the passenger compartment footwell

Fuse Data
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No.AmpsDescription
30130ALHD: Right rear door control unit
RHD: Left rear door control unit
30230ALHD: Right front door control unit
RHD: Left front door control unit
30330AWith code 278 (Fully electric front seats) or code 275 (Memory Package): Driver seat control unit (N32/1)
30430AWith code 278 (Fully electric front seats) or code 275 (Memory Package): Front passenger seat control unit (N32/2)
3055ARain/light sensor with additional functions
30630AWith code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heating for driver and front passenger), except code 278 (Fully electric front seats) and except code 275 (Memory Package): Front seat heating/seat ventilation control unit
With code 902 (Seat heater plus for driver and front passenger): Front passenger seat heater control unit
3075AWith code 362 (HERMES LTE) or code 364 (HERMES – UMTS communication module for Russia): HERMES control unit
3085ADiagnostics plug
30930AWith code 414 (Sliding sunroof): Sliding roof control module
Model 290 with code 416 (Panoramic roof): Panoramic roof roller sun blind control module
31030ALHD: Right front reversible emergency tensioning retractor
RHD: Left front reversible emergency tensioning retractor
3115AEngine 654, 656: Powertrain control unit, CDI control unit
Engine 177, 256, 264: ME-SFI (ME) control unit
3127.5ASupplemental Restraint System control unit
3137.5AMultimedia connection unit
31420AWith code 228 (Stationary heater): Stationary heater unit
31515AModel 290 (except 290.661): All-wheel drive control unit
With code B01 (48V technology): Pyrofuse
31610AOverhead control panel control unit
31715AHead unit
3185AWith code 882 (Interior protection and tow-away protection): Alarm siren
31910AKEYLESS-GO control unit
3205AFM, AM, CL, DAB and KEYLESS-GO antenna amplifier
32110AElectronic ignition lock control unit
3227.5AInstrument cluster

Multi Fuses

Assignment of the multi-fuses in the passenger compartment footwell

Fuse Data
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No.AmpsDescription
MF1-1—Spare
MF1-2—With code 243 (Active Lane Keeping Assist), code 513 (Traffic Sign Assist) or code 608 (Adaptive Highbeam Assist) or code 628 (Adaptive Highbeam Assist Plus) and except code 23P (Driving Assistance Package): Mono multifunction camera
With code 23P (Driving assistance package): Stereo multifunction camera
MF1-3—With code 899 (Multifunction telephony): Cellular telephone system antenna amplifier/compensator
With code 897 (Wireless mobile phone charging) and code 899 (Multifunction telephony): Mobile phone cradle control unit
With code 899 (Multifunction telephony): Mobile phone cradle control unit
MF1-4—With code 275 (Memory Package), except code 432 (Left and right dynamic multicontour seat): Driver’s seat lumbar support electropneumatic controller unit (N32/23)
With code 432 (Left and right dynamic multicontour seat): Left front multicontour seat control unit (N32/15)
MF1-5—With code 275 (Memory Package), except code 432 (Left and right dynamic multicontour seat): Front passenger seat lumbar support electropneumatic controller unit (N32/24)
With code 432 (Left and right dynamic multicontour seat): Right front multicontour seat control unit (N32/16)
MF1-6—With code 239 (Active Distance Assist DISTRONIC): Active Distance Assist DISTRONIC electric controller unit (A108/1)
With code 23P (Driving assistance package): Short-range and long-range radar sensor (B92/12)
MF2-1—With code P21 (Air quality package): Perfume atomizer generator (N59)
MF2-2—Spare
MF2-3—With code 463 (Head-up display): Heads-up display (A40/12)
MF2-4—With code 380 (Car telephony package): Telephone control unit (N123/9)
MF2-5—With code 448 (Touchpad): Audio/COMAND control panel (A40/9)
With code 446 (Touchpad only): Touchpad (A105)
Model 290: Left lower control panel (N72/4), Right lower control panel (N72/5)
MF2-6—Spare
MF3-1—Spare
MF3-2—Spare
MF3-3—With code 448 (Touchpad): Touchpad (A105)
MF3-4—Driver side instrument panel button group (S6/1)
MF3-5—With CODE 581 (Automatic air conditioning): Rear air conditioning operating unit (N22/4)
MF3-6—Model 290 with code 588 (AMG light activation sequence): AMG light activation sequence projector at left (E47/1), AMG light activation sequence projector at right (E47/2)

Luggage Compartment

Fuse Box Location

The fuse box is located in the trunk on the right side beneath the larger cover; to reach it, lower cover (1) in the direction of the arrow.

Fuse Box Diagram

Fuses

Assignment of the fuses in the luggage compartment

Fuse Data
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No.AmpsDescription
40330AExcept code 278 (Fully electric front seats) and except code 275 (Memory Package): Front passenger seat partially electric seat adjustment switch (S23/1)
40430AExcept code 278 (Fully electric front seats) and except code 275 (Memory Package): Driver seat partially electric seat adjustment switch (S22/1)
4055AModel 290 except code 224 (Design individual rear seat system): USB port in rear passenger compartment at left (X115/3), USB port in rear passenger compartment at right (X115/4)
Model 290 with code 224 (Individual rear seat system design): Rear cup holder (R5/3)
4065AWith code 380 (Car Telephony Package) and code 899 (Multifunction telephony): Telephone antenna changeover switch (A2/168)
40730AWith code 432 (Left and right dynamic multicontour seat): Multicontour seat pneumatic pump (M40)
40830AWith code 811 (Advanced sound system): Rear woofer amplifier (N40/14)
Model 257 with code B63 (Sporty engine sound), except code 810 (Sound system) and except code 811 (Advanced sound system): Engine sound control unit (N40/1)
40915AModel 257 with code U79 (BlueTEC (SCR) diesel exhaust gas cleaning, generation 3): AdBlue control unit (N118/5)
4105AWith code B01 (48V technology): DC/DC converter control unit (N83/1)
41125AFuel system control unit (N118)
4127.5AModel 257 with code 531 (COMAND APS) and code 830 (Additional parts for China vehicles), model 290 with code 531 (COMAND APS) and except code 498 (Japan version): Rear passenger compartment multimedia connection (A90/7)
Model 290 except code 224 (Design individual rear seat system): USB port, rear passenger compartment (X115/2), USB port in rear passenger compartment at left (X115/3), USB port in rear passenger compartment at right (X115/4)
Model 290 with code 224 (Individual rear seat system design): USB port in rear passenger compartment at left (X115/3), USB port in rear passenger compartment at right (X115/4)
4135AWith code B01 (48V technology): 48 V on-board electrical system battery (G1/3)
4145AWith code 865 (TV tuner): TV tuner control unit (N143)
4155AWith code 233 (DISTRONIC PLUS): Mercedes-Benz Intelligent Drive control unit (N62/4)
4165AWith code B24 (Remote control for stationary heater): Stationary heater radio remote control receiver (A6/1)
4177.5AWith code 891 (Premium ambient lighting): Ambiance illumination control unit (N162)
418—–
419—–
420—–
421—–
422—–
423—–
4247.5AModel 290 with code 898 (Wireless charging in rear passenger compartment) except code 224 (Individual rear seat system design): Mobile phone cradle control unit in rear passenger compartment (N123/10)
42530AWith code 906 (Front armrest heater): Armrest heater control unit (N5)
42615AModel 290 except code B26 (AMG Aerodynamics Package): Rear wing control unit (N170)
42725AModel 290 with code 467 (Electronic locking differential): Electric differential lock control unit (N3/2)
42815AWith code 489 (AIR BODY CONTROL): AIR BODY CONTROL Plus control unit (N51/8)
4295AModel 290: DIRECT SELECT INTERFACE (N150)
430—Spare
431—–
43250AModel 290 with code 201 (Rear axle steering): Right rear axle steering control unit (N68/4)
43350AModel 290 with code 201 (Rear axle steering): Left rear axle steering control unit (N68/3)
43440AWith code 489 (AIR BODY CONTROL): AIR BODY CONTROL relay (K67)
43550AModel 257 with code 881 (Remote trunk closing): Trunk lid control control unit (N121)
Model 290: Tailgate control control unit (N121/1)
436—–
437—–
438—–
439—–
440—–
441—–
4425AModel 290 with code 224 (Individual rear seat system design): Rear cup holder (R5/3)
443—Spare
44420AWith CODE 550 (Trailer hitch): Trailer recognition control unit (N28/1)
44530AWith CODE 550 (Trailer hitch): Trailer recognition control unit (N28/1)
44630AWith CODE 550 (Trailer hitch): Trailer recognition control unit (N28/1)
44720AWith CODE 550 (Trailer hitch): Trailer recognition control unit (N28/1)
44830AWith CODE 550 (Trailer hitch): Trailer recognition control unit (N28/1)
44925AWith code U67 (230 volt socket in interior) or code U80 (115V socket): DC/AC converter control unit (N24/3)
4507.5AEngine 256 with code M016 (Engine highperformance engine), engine 177: All-wheel drive control unit (N45)
45130AWith CODE 872 (Seat heater in rear): Rear seat heater control unit (N25/6)
45220AModel 290 with code 466 (Active engine mount): Active engine mounts control unit (N3/42)
45330AWith code 902 (Seat heater plus for driver and front passenger): Driver seat heater control unit (N25/5)
45415AWith code 489 (AIR BODY CONTROL): AIR BODY CONTROL control unit (N51/3)
With code 459 (Steel suspension with adjustable damping): Adaptive damping system control unit (N51/5)
4555AWith code U67 (230 volt socket in interior) or code U80 (115V socket): DC/AC converter control unit (N24/3)
45615ALuggage compartment socket (X58/12)
45715AModel 257 except code 897 (Wireless mobile phone charging) and except code 899 (Multifunction telephony) with code 301 (Smoker’s Package), model 290 with code 301 (Smoker’s Package): Front cigarette lighter with ashtray illumination (R3)
Except code 301 (Smoker’s package): Vehicle interior socket, front (X58/17)
With code 866 (Pre-installation for Rear Seat Entertainment System): Driver’s seat Rear Seat Entertainment system electrical connector (X55/3) and front passenger seat Rear Seat, Entertainment system electrical connector (X55/4)
Model 257 with code 460 (Canada version) or code 494 (USA version) and code 897 (Wireless mobile phone charging) or code 899 (Multifunction telephony): Front passenger footwell socket (X58/40)
45815AWith code 301 (Smoker’s package): Rear cigarette lighter (R3/1)
Except code 301 (Smoker’s package): Rear center console socket (X58/18)
45915AModel 290: Drive Unit control unit (N145/1)
460—–
461—–
462—–
463—–
4645AModel 290: Drive Unit control unit (N145/1)
465—Spare
466—Spare
4675AWith code 475 (Tire pressure monitoring system): Tire pressure monitoring system control unit (N88)
4687.5AWith code 235 (Parking Pilot with PARKTRONIC): Parking system control unit (N62)
With code 218 (Reversing camera) and except code 235 (Parking Pilot with PARKTRONIC): Reversing camera control unit (N66/2)
4695AWith CODE 871 (HANDS-FREE ACCESS): Rear switching module (N38)
4705AModel 290 with code 467 (Electronic locking differential): Electric differential lock control unit (N3/2)
471—Spare
472—Spare
47340AModel 257 with code U79 (BlueTEC (SCR) diesel exhaust gas cleaning, generation 3): AdBlue control unit (N118/5)
47450ARear window heater (R1)
47540AWith code 810 (Sound system): Sound system amplifier control unit (N40/3)
With code 811 (Advanced sound system): Advanced sound system amplifier control unit (N40/7)
Model 257 with engine 256 and code M016 (High performance boosted engine) except code B63 (Sporty engine sound) and except code 810 (Sound system) and except code 811 (Advanced sound system): Midline sound system amplifier control unit (N40/2)
47640ARear SAM control unit (N10/8)
47740ARear SAM control unit (N10/8)
47840AWith code 811 (Advanced sound system): Advanced sound system amplifier control unit (N40/7)
479—Spare
4805AModel 290 with code 224 (Individual rear seat system design): Touchscreen (A105/3)

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