Fuse holder mounting location A (A -SA-)
| Number | A | Function |
| 1 | 150 | Alternator -C- 90A / 110A |
| 1 | 200 | Alternator -C- 140A |
| 2 | 80 | Power steering control module -J500- Electromechanical power steering motor -V187-. |
| 3 | 50 | Radiator fan control unit -J293- Radiator fan -V7- Right coolant fan -V35- Radiator fan thermal switch -F18- Radiator fan -V7-. |
| 4 | 502)803) | On-board power control unit -J519-2) X-pin redundant relay -J59-2) Fuse 7 on fuse holder -SC7- Fuse 8 on fuse holder -SC8- Fuse 28 on fuse holder -SC28- to -SC33-. |
| 5 | 100 | Fuses on fuse holder C -SC- Fuse 20 on fuse holder -SC20- to -SC24- Fuse 42 on fuse holder -SC42- to -SC52-. |
| 6 | 40 | Low thermal power relay -J359-4) Auxiliary air heater element -Z35-. |
| 7 | 80 | High thermal power relay -J360-4) Auxiliary air heater element -Z35-. |
Location of E-box high fuse holder (B -SB-)
| Number | A | Function |
| 1 | – | Not used |
| 2 | – | Unused |
| 3 | 5 | On-board power control unit -J519-. |
| 4 | 30 | ABS control unit -J104- |
| 5 | 15 | Mechatronics for dual clutch transmission -J743- |
| 6 | – | Not used |
| 7 | 40 | Terminal 15 Supply voltage relay 2 -J681- |
| 8 | 15 | Control module with display for radio and navigation system -J503- Radio -R-. |
| 9 | 5 | Control module for cell phone service electronics -J412- Unused (as of May 2009). |
| 10 | 10 | Motronic current supply relay -J271- (BUD, BSX) Term. 30 supply voltage relay -J317- (BDJ, BST, BLS, BMM, BSU, BJB) Motronic control module -J623- (BSX, BUD) |
| 11 | 20 | Auxiliary heater control unit -J364-. |
| 12 | 5 | Data bus diagnostic interface -J533- Not used (as of May 2009). |
| 13 | 15 | Engine control module -J623- (BSX, BUD) Simos control module -J361- (BSE, BSF) |
| 13 | 30 | Diesel direct injection system control module -J248- (BDJ, BJB, BLS, BMM, BST, BSU) |
| 14 | 20 | Ignition coil 1 with output stage -N70- (BSX, BUD) Ignition coil 2 with output stage -N127- (BSX, BUD) Ignition coil 3 with output stage -N291- (BSX, BUD) Ignition coil 4 with output stage -N292- (BSX, BUD) Ignition transformer -N152- (BSE, BSF, BSX) |
| 15 | 5 | Fuel pump relay -J17- (BDJ, BJB, BLS, BMM, BST, BSU) Glow plug relay -J52- (BDJ, BST) Automatic light timing control module -J179- (BJB, BLS, BMM, BSU) |
| 15 | 10 | Fuel pump shut-off relay -J333- (BSX) Cylinder 1 injector -N30- (BUD) Cylinder 2 injector -N31- (BUD) Cylinder 3 injector -N32-. (BUD) Cylinder injector 4 -N33- (BUD) Gas injector 1 -N366- (BSX) Gas injector 2 -N367- (BSX) Gas injector 3 -N368- (BSX) Gas injector 4 -N369- (BSX) |
| 16 | 30 | On-board power control unit -J519- , right headlight |
| 17 | – | Unused |
| 18 | 30 | Special vehicle control unit -J608-. |
| 19 | 30 | Windshield wiper motor -V- |
| 20 | 40 | Glow plug 3 -Q12- (BDJ, BST) Glow plug 4 -Q13- (BDJ, BST) |
| 20 | 10 | Tank shut-off valve 1 -N361- (BSX) (since May 2009) Tank shut-off valve 2 -N362- (BSX) (since May 2009) Tank shut-off valve 3 -N363- (BSX) (since May 2009) Tank shut-off valve 4 -N429- (BSX) (since May 2009) Tank shut-off valve 5 -N430- (BSX) (since May 2009) |
| 21 | 10 | Lambda probe heater -Z19- (BLS, BMM) |
| 21 | 15 | Lambda probe heater -Z19- (BSE, BSF, BSX, BSX, BUD) Lambda probe heater 1 after catalytic converter -Z29- (BSE, BSF, BSX, BSX, BUD) |
| 22 | 5 | Clutch position transmitter -G476-. |
| 23 | 5 | Secondary air pump relay -J299- (BSE) Exhaust gas recirculation valve -N18- (BDJ, BST) |
| 23 | 10 | Exhaust gas recirculation valve -N18- (BJB, BSU) Charge pressure control solenoid valve -N75- (BJB, BLS, BMM, BSU) Exhaust gas recirculation radiator switch valve -N345- (BJB, BLS, BMM, BSU) Tank 1 shut-off valve -N361- (BSX) (until May 2009) Tank 2 shut-off valve -N362- (BSX) (until May 2009) Tank 3 shut-off valve -N363- (BSX) (until May 2009) High pressure valve for gas operation -N372- (BSX) Tank 4 shut-off valve -N429- (BSX) (until May 2009) |
| 24 | 10 | Cylinder injector 1 -N30- (BSX) Cylinder injector 2 -N31- (BSX) Cylinder injector 3 -N32- (BSX) Cylinder injector 4 -N33- (BSX) Activated carbon filter solenoid valve 1 -N80- (BSE, BSF, BUD) Variable intake manifold switch valve -N156- (BSE, BSF) Intake manifold flap motor -V157- (BDJ, BST) Radiator fan control unit -J293- Protective resistor -N235-. |
| 25 | 40 | ABS control unit -J104- |
| 26 | 40 | Built-in power control module -J519- , left headlight |
| 27 | 40 | Secondary air pump relay -J299- ( BSE) Secondary air pump motor -V101- Glow plug 1 -Q10- (BDJ, BST) Glow plug 2 -Q11- (BDJ, BST) |
| 27 | 50 | Automatic light timing control module -J179- (BJB, BLS, BMM, BSU) Glow plug 1 -Q10- Glow plug 2 -Q11- Glow plug 3 -Q12- Glow plug 4 -Q13-. |
| 28 | – | Unused |
| 29 | 30 | Fuses on fuse holder C -SC- (special purpose vehicles) Fuse 18 on fuse holder -SC18- Fuse 19 on fuse holder -SC19- Fuse 35 on fuse holder -SC35- to -SC39- Fuse 57 on fuse holder -SC57- Fuse 58 on fuse holder -SC58-. |
| 30 | 50 | Fuses on fuse holder C -SC- (trailer only) (until May 2009) Fuse 39 on fuse holder -SC39- to -SC41- Fuses on fuse holder C -SC- (trailer only) (from May 2009) Fuse 40 on fuse holder -SC40- to -SC42-. |
Fuse position on fuse holder C -SC-
| Number | A | Function |
| 1 | – | Not used |
| 2 | – | Unused |
| 3 | – | Unused |
| 4 | – | Unused |
| 5 | – | Unused |
| 6 | – | Unused |
| 7 | – | Unused |
| 8 | – | Unused |
| 9 | 10 | 4-pin connector -T4g- (only for special vehicles) 10-pin connector -T10c- (only for models with electrical interface) |
| 10 | 5 | Fuel pump relay -J17- (BSE, BSF, BUD, BSX) Power voltage relay terminal 15 -J329- (BSE, BSF) Data bus diagnostic interface -J533- Engine control unit -J623-. |
| 11 | 5 | Parking aid control unit -J446- (models with parking aid only) |
| 12 | 5 | Taximeter -G41- (taxicabs only) Mirror cab counter -G511- (taxicabs only) |
| 12 | 10 | 2-pin connector -T2ac- (applies to special vehicles only) 28-pin connector -T28a- (applies to special vehicles only) |
| 13 | 5 | Headlight range adjuster -E102- Left headlight range control motor -V48- Right headlight range control motor -V49- Traction control system switch -E132- TCS and ESP button -E256- Gear shift lever -E313- (direct transmission models only) Brake light switch -F- Brake light relay -J111- (models without central locking only) ABS control unit -J111- (applies to models without central locking only) ABS control unit -J131-.J104- Trailer detector control unit -J345- Power steering -J500- (power steering models only) Shift lever sensors -J587- (direct transmission models only) Mechatronics for dual clutch transmission -J743- (direct transmission models only) Four-wheel drive controller -J492-. |
| 14 | 5 | Air mass meters -G70- (BLS, BSU, BJB, BDJ, BST, BMM, CHWA) Heating element for crankcase breather -N79- (BSE, BSF, BLS, BSU, BJB, BSX, BMM, CHWA) Reversing light switch -F4- Auxiliary heater operation relay -J485- (models with auxiliary coolant heater only) Solenoid valve 1 -N80- (BSX) 16-pin connector -T16- (connection to self-diagnostics) |
| 15 | 5 | Airbag control unit -J234- Warning light off passenger side airbag -K145-. |
| 16 | 5 | Heater/heat output switch -E16- (models without A/C system only) High-pressure sender -G65- (models with A/C system only) Oil level and oil temperature sender -G266- (for models with flexible service interval display only) Climate control unit -J255- (models with Climatronic only) Control unit in dashboard insert -J255- (models with Climatronic only) Control unit in dashboard insert -J255- (models with Climatronic only) Control unit in dashboard insert -J255- (models with Climatronic only).J285- Low heat output relay -J359- (PTC heater (positive temperature coefficient) models only) High heat output relay -J360- (PTC heater (positive temperature coefficient) models only) Automatic interior anti-glare mirror -Y7- Air quality sensor -G238- (Climatronic models only) |
| 17 | 7.5 | Left rear lamp and rear fog light bulb -M41- (models without central locking) Rear fog light switch -F216- (models with trailer support and without central locking only) |
| 18 | 5 | Cab remote control, control unit -J601- (cabs only) 10-pin connector -T10c- (only for models with electrical interface) |
| 19 | 5 | 10-pin connector -T10c- (only for models with electrical interface) |
| 19 | 10 | Taximeter -G41- (cabs only) Mirror cab meter -G511- (cabs only) Two-way radio -R8- (cabs only) |
| 20 | 7.5 | On-board power control unit -J519- (Interior light) |
| 21 | 10 | Shift lever -E313- (Direct transmission models only) Shift lever sensors -J587- (Direct transmission models only) Three-phase switch -F189- (Direct transmission models only) Automatic transmission control unit -J217- 16-pin connector -T16- (Self-diagnostic connection) Climate control unit -J255- (Climatronic models only) Heater/heat output switch -E16-. Air conditioning system control unit -J301- Remote control receiver for auxiliary coolant heater -R149- (models with remote control receiver for auxiliary coolant heater only) Light switch -E1- Rain and light sensor -G397- (models with rain and light sensor only) Control unit in dash insert -J285- Electronic steering column control unit -J527- Data bus diagnostic interface -J533-. |
| 22 | 10 | Driver’s door control unit -J386- Passenger door control unit -J387-. |
| 23 | 5 | Interior light switch (cab) -E115- (cabs only) Taxi sign switch -E138- (cabs only) Hands-free system button -E487- (cabs only) |
| 23 | 10 | 3-pin connector -T3r- (for special vehicles only) 10-pin connector -T10c- (for models with electrical interface only) |
| 24 | 5 | Internal monitoring sensor -G273- Vehicle tilt transmitter -G384- Alarm horn -H12-. |
| 25 | – | Not used |
| 26 | 10 | 2-pin connector -T2ab- (applies to special vehicles only) |
| 27 | 15 | Deactivation relay for air conditioning system magnetic clutch -J246- (only for models with hydraulic steering system) |
| 28 | 5 | Light switch -E1- (models with central locking) |
| 28 | 20 | Rear fog light switch -E18- (models without central locking only) |
| 29 | 15 | Rear window wiper motor -V12- (models with rear window wiper only) |
| 30 | 25 | Light switch -E1- (models without central locking only) |
| 31 | 5 | Heater/heat output switch -E16- (models without air conditioning system only) Air conditioning system control unit -J301- (models with air conditioning system only) Air conditioning control unit -J255- (models with air conditioning system only) Left washer jet heater element -Z20- Right washer jet heater element -Z21-. |
| 32 | 15 | Windshield and rear window washer pump -V59-. |
| 33 | 40 | Heater/heat output switch -E16- Air conditioning system control unit -J301- Auxiliary heater operation relay -J485- (models with auxiliary coolant heater only) |
| 34 | – | Not used |
| 35 | 10 | Fluorescent light at the rear of the high roof -W41- (applies to special vehicles only) Fluorescent light in the center of the high roof -W42- (applies to special vehicles only) |
| 36 | – | Not used |
| 37 | 15 | Right dipped beam bulb -M31- (models without central locking) |
| 38 | 15 | Bulb with left dipped beam -M29- (models without central locking only) |
| 39 | 20 | 10-pin connector -T10ai- (applies to special vehicles only) |
| 40 | 20 | Trailer detector control unit -J345-. |
| 41 | 20 | Trailer detector control unit -J345- |
| 42 | 20 | Trailer detector control unit -J345- |
| 43 | 15 | Electric fuel pump 2 relay -J49- (BSE, BSF, BUD, BSX) Fuel pump relay -J17- (BDJ, BST, BLS, BSU, BJB, BSE, BSF, BUD, BSX, BMM) |
| 44 | 40 | Fresh air blower control unit -J126-. |
| 45 | 20 | Headlamp washer system relay -J39- (only models with headlamp washer system) Headlamp washer system pump -V11- (only models with headlamp washer system) |
| 46 | 15 | Treble horn -H2- Bass horn -H7- Horn relay -J413-. |
| 47 | 25 | Cigarette lighter -U1- |
| 48 | 30 | Heated front seats -J774-. |
| 49 | 30 | Driver’s door control unit -J386- (only for model with power window control) Passenger door control unit -J387- (only for model with power window control) |
| 50 | 25 | Convenient central control unit system -J393-. |
| 51 | 30 | 10-pin connector -T10ai- (applies to special vehicles only) |
| 52 | 25 | Fresh air blower relay -J13- (models with auxiliary heater only) On-board power control unit -J519- Heated rear window -Z1-. |
| 53 | 15 | 12-volt socket -U5- (near the handbrake lever) |
| 53 | 30 | 12 V socket -U5- (near the handbrake lever) 12 V socket 2 -U18- (left luggage compartment) |
| 54 | – | Not used |
| 55 | – | Unused |
| 56 | – | Unused |
| 57 | 5 | Two-way radio switch -E72- (applies only to special vehicles) Engine still running without button -E489- (applies only to special vehicles) Accident data memory -J754- (applies only to special vehicles) 10-pin connector -T10c- (only for models with electrical interface) |
| 58 | 10 | 4-pin connector -T4g- (applies to special vehicles only) |
| 59 | – | Not used |
| 60 | – | Unused |