Manuals+

Mercedes-Benz Fuse Assignment Supplement

Order No.: T447 0292 13

Part No.: 447 584 89 07

Edition: 2020-07

Publication Details

Internet:

Vehicle Manufacturer: Mercedes-Benz AG, Mercedesstraße 120, 70372 Stuttgart, Germany

Vehicle Dealers (USA): Daimler VANS USA, LLC, One Mercedes-Benz Drive, Sandy Springs, GA 30328. Customer Assistance Center: 1-877-762-8267

Vehicle Dealers (Canada): Mercedes-Benz Canada, Inc., 98 Vanderhoof Avenue, Toronto, ON M4G 4C9. Customer Relations Department: 1-800-387-0100

Note: Daimler VANS USA, LLC and Mercedes-Benz Canada, Inc. are Daimler AG enterprises.

Symbols

⚠️ DANGER: Danger due to not observing warning notices. Warning notices draw attention to hazards that may endanger health or life.

♻️ ENVIRONMENTAL NOTE: Environmental damage due to failure to observe environmental notes. Includes information on environmentally responsible behavior or disposal.

ℹ️ NOTE: Damage to property due to failure to observe notes on material damage. Informs of risks that may lead to vehicle damage.

▶️ Instructions: Indicates useful instructions or further information.

?️ Display: Refers to display in the multifunction display/media display or taximeter.

➡️ (Arrow Symbol): Indicates a cause.

General Notes on Fuses and Relays

⚠️ WARNING: Risk of accident and injury due to overloaded lines. Manipulating or bridging a faulty fuse, or replacing it with a fuse of higher amperage, can overload the electric line and cause a fire. Always replace faulty fuses with specified new fuses containing the correct amperage.

ℹ️ NOTE: Damage or malfunctions caused by moisture. Moisture can damage the electrical system. Ensure no moisture enters the fuse box when open, and that the seal is correctly positioned when closing.

Electrical fuses switch off defective circuits. If a fuse blows, components on that circuit cease to operate. Replace faulty fuses with fuses of the same type and rating. If a fuse blows repeatedly, have the cause determined by a qualified specialist workshop.

Fuses and relays are located in the following fuse boxes:

Always have fuses in the pre-fuse box and relays in the fuse boxes replaced at a qualified specialist workshop.

Preparing to Replace a Fuse

Fuses and Relays in the Engine Compartment

Opening and Closing the Fuse Box

Opening:

Closing:

Diagram illustrating the process of opening the fuse box in the engine compartment. It shows retaining clamps (labeled 2) and a cover (labeled 1) to be folded out.

Fuses in the Engine Compartment

Diagram showing the fuse assignment in the engine compartment, viewed rotated 90 degrees, with fuse holders labeled S1, S2, S3, S4, S5-S14 and individual fuse positions.

Fuse HolderNo.ConsumerFusesFuse Rating
S11ESP valvesF20425 A
S12HornF20515 A
S13Engine control unit (OM654/OM622 model facelift)F2065 A
S14Shift module (NAG2)F20725 A
S15UnassignedF208-
S16Supply relay N (terminal 87 engine) (OM622 model facelift)F2095 A
S17UnassignedF210-
S21UnassignedF211-
S22Vehicles with a gasoline engine: terminal 87 (4) engine control unit (M274)F21215 A
S22Vehicles with diesel engine: terminal 87 (4) NOx sensors/soot particulate sensorF21215 A
S23Terminal 87 (2)F21315 A
S24Terminal 87 (3) (OM622/OM651/M274)F21410 A
S1 (cont.)5Terminal 87 (3) (OM622 model facelift/OM654)F21515 A
S1 (cont.)5Terminal 87 (1) (OM651)F21520 A
S1 (cont.)5Terminal 87 (1) (OM622 model facelift/OM654)F21525 A
S1 (cont.)6Engine control unit terminal 30G (OM622/OM651/M274)F2165 A
S1 (cont.)7UnassignedF217-
S31Headlamp range adjustment, left (halogen headlamps)F2295 A
S32ESP®F2305 A
S33Headlamp range adjustment, right (halogen headlamps)F2315 A
S34UnassignedF232-
S35Fuel filter heating (OM622 model facelift)F23325 A
S36Terminal 87 C1 (drive control CPC)F23410 A
S37Terminal 87 C2 (drive control CPC)F23510 A
S41Engine control unit (OM654/OM622 model facelift)F2225 A
S42CPC drive controlF2237.5 A
S43COLLISION PREVENTION ASSIST/DISTRONIC PLUSF2247.5 A
S44UnassignedF225-
S45Radiator fan/radiator shutters (OM622/OM651/M274 with NAG2)F2265 A
S46Automatic transmission control unit (NAG2)F22710 A
S47Additional oil pump (central oil pump) (NAG2)F22815 A
S5-ATA (anti-theft alarm system) hornF2015 A
S6-Auxiliary heating control unitF20220 A
S7-HLI LED headlamp control unit (headlamp functions)F20320 A
S8-ESP® control unitF2185 A
S9-UnassignedF219-
S10-UnassignedF220-
S11-UnassignedF238-
S12-ESP pumpF23740 A
S13-CBC 2 signal acquisition and actuation moduleF23640 A
S14-LED headlamp local control unit (LED high beam)F22140 A

Additional fuses on the relay carrier

No.ConsumerFusesFuse Rating
-Windshield wipersF23930 A
-Starter terminal 50F240A25 A
-UnassignedF241-

Relays in the Engine Compartment

Diagram showing the relay assignment in the engine compartment, viewed rotated 90 degrees, with positions labeled J, K, L, M, N, O, P, Q, R, S, T.

No.FunctionRelays
-HornJ
-Windshield wipers, continuous wipeK
-Windshield wipers on/offL
-Starter motorM
-Terminal 87, engineN
-UnassignedO
-UnassignedP
-UnassignedQ
-Terminal 15R
-Terminal 87CS
-UnassignedT

Fuses and Relays in the Co-Driver Footwell

Opening and Closing the Fuse Box

Opening:

Closing:

Diagram illustrating the process of opening the fuse box in the co-driver footwell. It shows a retaining clamp (labeled 1) and a cover (labeled 2) to be folded out.

Fuses in the Co-Driver Footwell

Diagram showing the fuse assignment in the co-driver footwell, with fuse holders S1 through S29 and individual fuse positions.

Fuse HolderNo.ConsumerFusesFuse Rating
S11Rear view cameraF287.5 A
S12Radio head unitF2925 A
S13Pre-installation for radioF3015 A
S14Lane Keeping Assist, steering wheelF3110 A
S14Heating/dual-zone automatic climate control/3-zone automatic climate controlF3110 A
S15Control panel with touchpad in the center of the center consoleF327.5 A
S16Radio head unitF335 A
S17Cigarette lighterF3415 A
S21Driver seat control unitF367.5 A
S22Fuse box in the engine compartment (PDC-E)F3730 A
S23Control unit, airbagF387.5 A
S24UnassignedF39-
S25SCRCM exhaust gas aftertreatment control unit (OM654/OM622 model facelift)F4015 A
S26SCRCM exhaust gas aftertreatment heater (OM654/OM622 model facelift)F4130 A
S27Co-driver seat control unitF427.5 A
S31Steering column tube moduleF495 A
S32Radio display head unit and fanF507.5 A
S33UnassignedF51-
S34Media InterfaceF525 A
S35Toll collection system, Japan (DSRC)F537.5 A
S36Climate control blowerF5430 A
S37Ignition lock/electronic steering lockF5520 A
S41Control unit, front door, leftF6430 A
S42Control unit, front door, rightF6530 A
S43Rear-end door window wiper, rightF6620 A
S44Electric parking brakeF677.5 A
S45Control unit, airbagF687.5 A
S46Automatic co-driver airbag shutoffF695 A
S47UnassignedF70-
S51UnassignedF71-
S5212 V sockets, cargo compartmentF7215 A
S53Electric parking brakeF7330 A
S54Electric sliding door, right/EASY-PACK tailgateF7430 A
S55Trailer module 1F7515 A
S56Trailer module 2F7625 A
S57Trailer module 3F7725 A
S6-Digital rearview mirrorF235 A
S7-Trailer control unitF247.5 A
S8-Support battery, charging connectionF2510 A
S9-Trailer control unitF2615 A
S10-Fuse box in the co-driver footwell on the A-pillar (PDC-F)F275 A
S11-Rear window heaterF3530 A
S12-Rear Seat Entertainment SystemF4310 A
S13-Emergency Tensioning Device, front seat, left (PRE-SAFE®)F4440 A
S14-Emergency Tensioning Device, front seat, right (PRE-SAFE®)F4540 A
S15-SCRCM exhaust gas aftertreatment (gen.2) (OM651)F4610 A
S16-SCRCM exhaust gas aftertreatment (gen.2) (OM651)F4720 A
S17-SCRCM exhaust gas aftertreatment (gen.2) (OM651)F4815 A
S18-CPC drive controlF5610 A
S18 (cont.)-SCRCM exhaust gas aftertreatment (gen.2) (OM651)F575 A
S19-UnassignedF57-
S20-Trailer brake booster (only for USA)F5825 A
S21-Co-driver seat control unitF5930 A
S22-Driver seat control unitF6030 A
S23-Amplifier, sound systemF6140 A
S24-Roof turn signalsF6210 A
S25-Fuel supply system control unitF6320 A
S26-Panoramic roofF7830 A
S27-CBC 1 signal acquisition and actuation moduleF7940 A
S28-CBC 3 signal acquisition and actuation moduleF8040 A
S29-Blower, rear-compartment climate controlF8130 A

Additional fuses on the relay carrier

No.ConsumerFusesFuse Rating
-PTC heater boosterF21200 A
-Support batteryF22200 A
-Star 2.5 central gatewayF825 A
-Electronic ignition lockF837.5 A
-Center console control panel/control panel on the left next to the steering wheelF847.5 A
-Radio remote control receiver/Hermes moduleF855 A
-RF antennaF865 A
-Diagnostics connectionF8710 A
-Instrument clusterF8810 A
-Light switch, diagnostics connectionF895 A
-Blind Spot AssistF905 A
-Exhaust gas aftertreatment, SCR control unitF915 A
-Fuel supply system control unitF925 A
-Pre-installation for radioF937.5 A
-Toll collection system, Japan (DSRC)F9415 A
-Pre-installation for mobile KD devicesF9415 A
-Glove box lampF955 A

Relays in the Co-Driver Footwell

Diagram showing the relay assignment in the co-driver footwell, with positions labeled A through G.

No.FunctionRelays
-Terminal 15 relayA
-Rear window wiperB
-Terminal 15 R2C
-Rear window heaterD
-Terminal 15 R1E
-Terminal 30 G resetF
-SCRCM exhaust gas aftertreatmentG

Fuses and Relays in the Co-Driver Footwell on the A-pillar

Opening and Closing the Fuse Box

Opening:

Closing:

Diagram illustrating the process of opening the fuse box on the A-pillar, showing a cover (labeled 1) to be removed.

Fuses in the A-pillar

Diagram showing the fuse assignment in the A-pillar fuse box, with fuse holders S1, S2, S3, S6, S8 and individual fuse positions.

Fuse HolderNo.ConsumerFusesFuse Rating
S11Rear seat heating/rear seat ventilation, row 1 leftF30510 A
S12Rear seat heating/rear seat ventilation, row 1 rightF30810 A
S13Rear seat heating/rear seat ventilation, row 2 leftF31010 A
S14Rear seat heating/rear seat ventilation, row 2 rightF30910 A
S15Digital timer for the stationary air heaterF3165 A
S16Control unit for rear seat heating/rear seat ventilationF3175 A
S21Parameterizable special module (PSM)F30325 A
S22Parameterizable special module (PSM)F30425 A
S23Center console refrigerator boxF30610 A
S24Voltage converterF31230 A
S25Electric sliding door, leftF31130 A
S26Onboard Logic UnitF3185 A
S3-UnassignedF300-
S4-Terminal 30 body manufacturerF32125 A
S4-Center console cup holder-10 A
S5-UnassignedF302-
S6-Air heater (with auxiliary battery)F3235 A
S81TachographF3015 A
S82UnassignedF307-
S83TachographF3157.5 A
S91Terminal 15 center consoleF3145 A
S92Terminal 61 body manufacturerF31915 A
S93Terminal 15 body manufacturerF32015 A
S94UnassignedF322-

Relays in the A-pillar

Diagram showing the relay assignment in the A-pillar fuse box, with positions labeled A, B, C.

No.FunctionRelays
-Terminal 15 relayA
-UnassignedB
-UnassignedC

Fuses and Relays in the Rear Compartment

Opening and Closing the Fuse Box

Opening:

Closing:

Diagram illustrating the fuse box location in the rear compartment, with a tool holder (labeled 1) and a diagram of fuse and relay holders.

Fuses and Relays in the Rear Compartment

No.ConsumerFuseFuse Rating
112 V socket, second row of seats, leftF11015 A
212 V socket, second row of seats, rightF110/115 A
312 V socket, first row of seats, leftF110/215 A
No.FunctionRelays
412 V sockets in the rear compartmentK127

Fuses in the Seat Base of the Right-Hand Front Seat

Pre-fuse Box in the Seat Base

The pre-fuse box (labeled 1) is located next to the starter battery in the seat base of the right-hand front seat. Always have the fuses in the pre-fuse box replaced at a qualified specialist workshop.

Diagram showing the battery compartment in the seat base of the right-hand front seat, with the pre-fuse box labeled 1.

Fuses (Pre-fuse box)

No.ConsumerFuseFuse Rating
1UnassignedA16-
2UnassignedA15-
3Starter motorA1Pyrofuse
4Fuse box in the co-driver footwell on the A-pillar (PDC-F)A8150 A
5Auxiliary batteryA12150 A
6Control unit, pre-glow systemA2100 A
7AlternatorE2350 A
8FanA10100 A
9Air suspension compressorA950 A
10Fuse box in the engine compartment (PDC-E)A7150 A
11Onboard Logic UnitA1440 A
12Automatic transmission (NAG3)A350 A
13Fuse box in the co-driver footwell (PDC-P)A6250 A
14CBC signal acquisition and actuation moduleA1340 A
15ESP® 9.3A560 A
16Electric steeringA11100 A
17Sockets in the rear compartmentA450 A

Fuses at the Back of the Right Seat Base

The fuse for the emergency P battery is on the side of the battery carrier.

Diagram showing the starter battery location at the back of the right seat base.

Fuses (Back of Seat Base)

No.ConsumerFuseFuse Rating
-Support battery supply/emergency P battery supply, automatic transmissionF1095 A

Fuse Box in the Right Seat Base (9-way fuse box F55/2)

No.ConsumerFuseFuse Rating
-Onboard Logic Unit, sensor1010 A
-Onboard Logic Unit; computing unit1110 A
-Onboard Logic Unit, connecting unit125 A

Additional Fuses (Seat Base)

No.ConsumerFuseFuse Rating
-Unassigned13-
-Unassigned14-
-Unassigned15-
-Unassigned16-
-WVC starter battery charge (Marco Polo)1725 A
-Glass sliding sunroof (Marco Polo ACTIVITY/HORIZON)1825 A
Models: MY2021 Metris, MY2021, Metris

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MY2021 Metris Fuse Assignment

References

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