12V incandescent lamps | ||
To be able to replace a lamp at any time, it is necessary to always have a box with the most important spare lamps in your car. | ||
Purpose | Base, Type | Power, W |
| Fog light | H1 | 55 |
| Side lights | W | 5 |
| High beam | H7 | 55 |
| Low beam | H7 | 55 |
| Direction indicator light | PY | 21 (yellow) |
Left relay and fuse box K40/6 engine compartment
1-91 - fuses
A-X — relay
X — direction of vehicle movement
Fuse | Chain | Wire color protects circuits | Protected circuit | Current strength (A) |
| 1 | 87 | — | Windscreen wiper heating relay (K40/6kA) | 40 |
| 2 | 87 | — | Relay for injection/drainage pumps (K40/6kF) | 50 |
| 3 | 30 | — | Horizontal adjustment of the steering column position: • Relay 1 for longitudinal adjustment of the steering column (K40/6kD) • Relay 2 for longitudinal adjustment of the steering column (K40/6kE) | 15 |
| 4 | 30 | — | Vertical adjustment of the steering column position: • Relay 1 for steering column angle adjustment (K40/6kI) • Relay 2 for steering column angle adjustment (K40/6kJ) | 15 |
| 5 | 15R (since 09.2002 - 15) | — | Windscreen wiper ON/OFF relay (K40/6kH) | 40 |
| 6 | 15 (since 09.2002 – absent) | B/f 0.75 mm² (not available since 09.2002) | Additional heater switch (S4/3) (not available since 09.2002) | 7.5 (since 09.2002 – absent) |
| 7 | 15(since 09.2002 – absent) | – | — | — |
| 8 | 30 (since 09.2002 – absent) | — | — | — |
| 9 | 30 | K/b 1.5 mm² | with air suspension: • Airmatic system control unit with ADS (N51) with the Active Body Control (ABC) system: • ABC system control unit (N51/2) | 30 |
| 10 | 15 | H/g 0.75 mm² | Windscreen washer pump (M5/1) | 15 |
| 11 (since 09.2002 – only on models for Japan) | 15R | Ch/s 1.5 mm² (from 09.2002 – Ch/s 0.5 mm²) | Cigarette lighter with front ashtray illumination (R3) (from 09.2002 – VISC power split point X137/1) | 15 (since 09.2002 – 5) |
| 12 | 15R | R/z 0.5 mm² (not available since 09.2002) | Dynamic seat belt locking (A60) (from 09.2002 – not available) | 7.5 (since 09.2002 – absent) |
| 13 | 30 | K/h 4.0 mm² | Front left door control unit (N69/1) | 40 |
| 14 | 15R | — | — | – (since 09.2002 – 10) |
| 15 | 30 | — | — | – (since 09.2002 – 30) |
| 16 | 15R | H/g 0.5 mm² | Brake light switch (S9/1) | 7.5 |
| 17 | — | — | — | — |
| 18 | 15R | B/W 0.75 mm² B/W 0.5 mm² | If you have a GSM mobile phone (D2B) (basic equipment) (code 317): • mobile phone plug connector (X39/39) If you have a MB GSM (D2B) phone (code 316): • D2B interface for landline telephone (A59) If you have an MB GSM (D2B) telephone (code 316) with the Tele Aid emergency call system (code 347): • Tele Aid system control unit (A35/8) If you have an MB GSM (D2B) telephone (code 316) with the E-Call emergency call system (code 349) via the cable connector of terminal 15R (Z3/12): • D2B interface for landline telephone (A59) • Range switching control unit (N96) • E-Call system control unit (A35/8) (since 09.2002 – If there is an MB GSM telephone (D2B) (code 854): • via connector 15R(Z3/1) circuit 2: - frequency selection control unit (N96) - E-Call control unit (A35/8) - D2B interface for mobile phone (A59/1) | 5 |
| 19 | 15 | – (since 09.2002 – K/f 0.5 mm²) | – (since 09.2002 – front left (A76) and right (A76/1) reversible emergency tensioners) | – (since 09.2002 – 5) |
| 20 | 15 | B/w 0.5 mm² (not available since 09.2002) | Instrument cluster (A1) Diagnostic connector (X11/4) (from 09.2002 – missing) | 5 (since 09.2002 – absent) |
| 21 | 15R | Black 0.5 mm² (not available since 09.2002) | Instrument panel (A1) (from 09.2002 – missing) | 5 (since 09.2002 – absent) |
| 22 | 30 | Size 0.75 mm² (from 09.2002 – 2.5 mm²) | Instrument panel (A1) (from 09.2002 – Radio (A2) control panel with COMAND system display (A40/3)) | 5 (since 09.2002 – 15) |
| 23 | 30 | K/b 1.5 mm² K/b 0.75 mm²K/b 0.5 mm²K/b 0.75 mm²(since 09.2002 – K/f 0.75 mm²) | Via cable connector terminal 30 KLA (Z7/21): • KLA control panel (N₂2) • circulation pump (A31/1m1) • left double valve (A31/1y1) • right double valve (A31/1y2)(from 09.2002 – With TV tuner (code 860): TV tuner (A2/10)With TV tuner (code 860): Via connector (Z4/3) of circuit 30 models for Japan:- TV tuner (A2/10)- radio with CD changer (A2/16)) | 10 |
| 24 | 30 | K/g 0.75 mm² (from 09.2002 – K/g 2.5 mm²) | Diagnostic connector (X11/4) (from 09.2002 – audio input control unit) | 10 (since 09.2002 – 20) |
| 25 | 30 | – (since 09.2002 – K/f 2.5 mm²) | – (since 09.2002 – Sound amplifier (A2/13)) | – (since 09.2002 – 25) |
| 26 | 30 (since 09.2002 – absent) | C/h 0.75 mm² (not available since 09.2002) | Upper control panel (N72/1) (since 09.2002 – missing) | 10 (since 09.2002 – absent) |
| 27 | 30 | — | — | — |
Right relay and fuse box K40/7 engine compartment
Fuse | Chain | Wire color protects circuits | Protected circuit | Current strength (A) |
| 28 | 30 | – | Sound signal relay (K40/7kP) | 15 |
| 29 | 87 | – | Relay for electronic engine and chassis control systems (K40/7kK) | 20 |
| 30 | 87 | – | Relay for electronic engine and chassis control systems (K40/7kK) | 20 |
| 31 | 87 | – | Air pump relay (K40/7kN) | 40 |
| 32 | 87 | – | Air compressor relay (K40/7kO) | 40 |
| 33 | 30 | K/f 4.0 mm² | Heating system air circulation unit (A32) | 40 |
| 34 | 87 | Size 0.5 mm² (from 09.2002 – 1.0 mm²) | Traction control system control unit (N47) | 5 (since 09.2002 – 10) |
| 35 | 30 | – (from 09.2002 – 1.5 mm²) | – (from 09.2002 – If heated steering wheel (code 443): Steering wheel heater (R22/4)) | – (since 09.2002 – 15) |
| 36 | 87 | To 0.5 mm² | If the Distronic system is present (code 219a): DTR system control unit (N63/1) | 7.5 |
| 37 | 87 | K/f 1.5 mm² K/w 0.75 mm² | Cable connector class 87 (Z7/5): • control unit of the electronic module of the AT control lever (N15/5) • EGS system control unit (N15/3) | 15 |
| 38 (USA) (since 09.2002 – all models) | 30 | K/h 0.5 mm² | Interior trunk lid actuator button (KIT) | 5 |
| 39 | 30 | K/h 4.0 mm² | Front right door control unit (N69/2) | 40 |
| 40 | 15 | To 0.75 mm² | If xenon headlights are present (code 612b): headlamp range control unit (N71) | 10 |
| 41 | 30 | To 2.5 mm² To 0.75 mm² | If there is an autonomous heating system (code 228): via the cable connector terminal 30 (soldered sleeve in a wire harness) (Z7/26): • independent heater (STH) or additional heater (ZUH) (A6) • STH remote control receiver (A6/1) | 20 |
| 42 | 30 | B/g 1.5 mm² | • via cable connector class 87 (Z7/24) (until 09.2002.): – additional fan unit relay (K25) | 20 |
| 43 (from 09.2002 - 43 OM628 and OM 648) | 87 | K/g 4.0 mm² K/g 2.5 mm² K/g 0.5 mm² | For diesel engines only: • via cable connector terminal 87 (Z7/47) (until 09.2002.):– CDI control unit (N3/9)– starter relay (K40/kL) in the front right relay and fuse box (K40/7) | 25 |
| 44 OM613 (from 09.2002 - 44 OM628 and OM648) | 87 | K/z 1.5 mm² Short-circuit 1.0 mm² (from 09.2002 – 0.75 mm²) | For diesel engines only: • CDI control unit (N3/9) • intake manifold heater, in the front right relay and fuse box (K40/7) | 7.5 |
| 44 OM628 | 87 | K/z 2.5 mm² K/z 1.5 mm² K/z 0.5 mm² K/z 0.75 mm² | via cable connector terminal 87D2 (Z7/48) (until 09.2002.): • CDI control unit (N3/9) • starter relay (K40/kL) in the front right relay and fuse box (K40/7) • electric fan-blower of the engine and air conditioner with a built-in regulator (M4/7) • low-temperature circuit circulation pump (M44) | 10 |
| 45 | — | — | — | — |
| 46 | 87 | B/W 0.5 mm² (since 09.2002 -) | With Active Body Control (ABC) system: • ABC system control unit (N51/2)If equipped with air suspension: • Airmatic system control unit with ADS (N51) | 5 |
| 47 | 15 | H/g 0.75 mm² H/g 0.5 mm² H/g 0.75 mm² (until 09.2002.) H/g 0.5 mm² (until 09.2002.) | Multifunctional sensor KLA (B31/1) Fan electric motor in protective electrical equipment box (M2/2) Multifunctional sensor KLA (B31/1) (until 09.2002.) Control of the relay of the additional fan unit of the engine cooling system or AT oil (K25) via a plug connector (X22/3) (until 09.2002.) Via cable electrical circuit of fans (Z5/1) (until 09.2002.) • multifunctional sensor KLA (B31/1) (until 09.2002.) • control of the relay of the additional fan unit of the engine cooling system or oil in the AT (K25) via a plug connector (X22/3) (until 09.2002.) • electric fan motor in the protective box of electrical equipment (M2/2) (until 09.2002.) | 10 |
| 48 M112/113 (since 09.2002 - 48) | 15 | B/f 0.5 mm² (since 09.2002 - absent) | Blower Fan Control Unit (N65/2) (since 09.2002 - absent) | 7.5 (since 09.2002 - absent) |
| 48 M137 (since 09.2002 - 48) | 15 | B/f 0.5 mm² (since 09.2002 - absent) | Electric fan-blower of the engine and air conditioner with a built-in regulator (M4/7) (since 09.2002 - absent) | 7.5 (since 09.2002 - absent) |
| 49 | 15 | B/W 1.5 mm² Through 1.5 mm² H 1.0 mm² (from 09.2002 – H/w 1.0 mm²) | Via cable connector of protected terminal 15 (Z3/29): • ignition coils (T1/1) - (T1/8) • radio interference suppression capacitor (C4), for Japan and USA | 15 |
Rear Relay and Fuse Box K40/5
Fuse | Chain | Wire color protects circuits | Protected circuit | Current strength (A) |
| 50 | — | — | Rear window curtain drive relay (K40/5kQ) | 10 |
| 51 | — | — | Tow-away protection relay (K40/5kR) | 5 |
| 52 | 30 (since 09.2002 - absent) | – | Fuel pump relay (K40/5kT) | 30 |
| 53 | 30 | – | Rear window heating relay (K40/5kU) | 50 |
| 54 | 15 | R/k 0.75 mm² | Trailer presence recognition system control unit (N₂8/1) | 10 |
| 55 | 30 | K/f 2.5 mm² | Towing hitch socket, 13-pin (X58) | 25 |
| 56 | 30 | K/f 2.5 mm² | Trailer presence recognition system control unit (N₂8/1) | 30 |
| 57 | 30 | To 2.5 mm² | If you have a remote tailgate drive (HDFS): • via cable connector terminal 30 (soldered sleeve in a wire harness) (Z7/26) (from 09.2002 – Z7/32):– trunk lid opening relay (K69/1)– trunk lid closing relay (K69/2)– from 09.2002 – hydraulic pump | 25 |
| 58 | 30 | C/h 0.75 mm² | Via cable connector protected terminal 30, Keyless-Go system (Z7/19): • Keyless Go system control unit (N69/5) • Keyless Go antenna front left door (A2/38) • Keyless Go antenna rear left door (A2/39) • Keyless Go antenna front right door (A2/40) • Keyless Go antenna rear right door (A2/41) • Keyless Go power solenoid front left door (L12) • Keyless Go power solenoid for rear left door (L12/1) • Keyless Go power solenoid front right door (L12/2) • Keyless Go power solenoid for rear right door (L12/3) | 7.5 |
| 59 | 30 | K/b 2x2.5 mm² (since 09.2002 – 1x2.5 mm²) | Multifunctional control unit for special vehicles (MSS) (N₂6/9), taxi only | 30 |
| 60 | 15 (since 09.2002 – 30) | – (from 09.2002 – 0.75 mm²) | – (from 09.2002 – rear window antenna amplifier unit (A2/12) point X137/1 VISC power supply split) | 7.5 |
| 61 (Japan) | 30 | K/f 1.5 mm² K/w 0.75 mm² K/f 1.5 mm² K/w 0.75 mm² K/f 1.5 mm² K/f 1.5 mm² K/f 0.5 mm² K/w 0.75 mm² K/f 0.5 mm² K/w 0.75 mm² | If you have a radio (D2B): • via cable connector terminal 30 (Z4/3):– radio (A2)– antenna amplifier module above the rear window (A2/12)from 09.2002 – E-Call control unit (N112)– hands-free control unit (A35/1)If there is a radio (D2B) with CD changer (code 819): • via cable connector terminal 30 (Z4/3):– radio (A2)– antenna amplifier module above the rear window (A2/12)– CD player with changer (in the trunk) (A2/6)If the communication and navigation system (COMAND) is present: • control panel with COMAND display (A40/3) • via cable connector terminal 30 (Z4/3):– telephone plug connector, terminal 15C (X39/40)– TV tuner (A2/10), for Japan– video decoder (A2/11)– terminal 15 load-shedding relay (K41) | 15 |
| 61 | 30 | K/f 1.5 mm² K/w 0.75 mm² K/f 1.5 mm² K/w 0.75 mm² K/f 1.0 mm² K/f 1.5 mm² K/w 0.75 mm² | If you have a radio (D2B): • via cable connector terminal 30 (Z4/3):– radio (A2)– antenna amplifier module above the rear window (A2/12)If there is a radio (D2B) with CD changer (code 819): • via cable connector terminal 30 (Z4/3):– radio (A2)– antenna amplifier module above the rear window (A2/12)– CD player with changer (in the trunk) (A2/6)If the communication and navigation system (COMAND) is present: • control panel with COMAND display (A40/3) • via cable connector terminal 30 (Z4/3):– control panel with COMAND display (A40/3n1)– antenna amplifier module above the rear window (A2/12)– navigation computer (A40/3n2)– TV tuner (A2/42), for Europe and the USA | 15 |
| 61 | 30 | K/f 1.0 mm² K/f 1.5 mm² K/w 0.75 mm² | If the communication and navigation system (COMAND) with traffic data memory is available: • control panel with COMAND display (A40/3) • via cable connector terminal 30 (Z4/3):– control panel with COMAND display (A40/3)– traffic data memory unit (A2/43)– navigation computer (A40/3n2)– antenna amplifier module above the rear window (A2/12) | 15 |
| 61 | 30 | K/h 1.5 mm² K/h 0.5 mm² K/h 0.75 mm² K/h 0.5 mm² K/h 1.5 mm² K/h 0.75 mm² | If you have an MB GSM (D2B) telephone (code 853) with the Tele Aid emergency call system (code 855): • phone support via connector tip (in the wiring harness) (Z28/30):- Tele Aid system control unit (A35/8)- telephone transceiver, D2B (A35/13) • via connector tip (Z7/46) of circuit 30:- voice control system control unit (A35/11)If there is an MB GSM telephone (D2B) (code 854): • D2B interface for mobile phone (A59/1) • compensator (A28/3) • via connector tip (Z7/46) of circuit 30:- voice control system control unit (A35/11)If there is an MB GSM telephone (D2B) (code 854) with E-Call emergency call system (code 349) • via connector tip (Z7/26) of circuit 30:- E-Call control unit (N112)- voice control system control unit (A35/11)- E-net compensator (A28/3)- D2B interface for mobile phone (A59/1) • via connector tip (Z7/46) of circuit 30:- voice control system control unit (A35/11)If there is a GSM mobile phone (D2B) (basic equipment) (code 380): • mobile phone plug connector (X39/39) • D2B interface for mobile phone (A59/1) | 15 |
| 62 | 30 | K/h 1.5 mm² | Pneumatic control unit with combined functions (A37) | 20 |
| 63 | 30 | K/h 0.75 mm² K/h 0.5 mm² C/h 0.75 mm² (from 09.2002 – 4.0 mm²) | If you have a D2B phone (code 316): • D2B interface for landline telephone (A59) • telephone transceiver (A35) if there is an emergency call system (TELE AID), • TELE AID system control unit (A35/8) or If you have a D2B telephone (code 316) with a voice control system (813b): • via cable connector terminal 30 (soldered sleeve in a wire harness) (Z7/26):– D2B interface for landline telephone (A59)– telephone transceiver (A35)– voice control system control unit (A35/11) if emergency call system (TELE AID) is available– TELE AID system control unit (A35/8)If D2B mobile telephone is available (code 317) (basic equipment): • mobile phone plug connector (X39/39) • Traffic data memory unit (A2/43)(from 09.2002 – pneumatic pump for seat control (M40/1)) | 7.5 (since 09.2002 - 30) |
| 64 (Japan) | 30 | K/zh 0.75 mm² (since 09.2002 – K/kor 2.5 mm²) | • control panel with COMAND display (A40/3) • Antenna amplifier module above rear window (A2/12)(from 09.2002 – Control unit for left front seat adjustment with memory function (N32/1)) | 7.5 (since 09.2002 – 25) |
| 65 | — | — | — | — |
| 66 | 30 | K/f 2.5 mm² (from 09.2002 – C/f 2.5 mm²) | If you have a radio (D2B) with an acoustic system (code 810): • Sound amplifier (A2/13)(from 09.2002 – Control unit for right front seat adjustment with memory function (N32/2)) | 25 |
| 67 | 30 | K/g 2.5 mm² | Rear seat control unit (N₂5/6) | 25 |
| 68 | 30 | K/b 1.0 mm² K/b 0.8 mm² K/b 0.5 mm² K/b 0.5 mm² K/b 0.8 mm² | via cable connector class 30 (Z7/40): • rear air conditioning control unit (N₂2/4) • refrigerant shut-off valve in rear air conditioner (Y67) • pump unit of the rear passenger compartment heating system (A31/1)- circulation pump (A31/1m1)- left double valve (A31/1y1)- right double valve (A31/1y2) | 15 |
| 69 | 30 | K/h 1.0 mm² | If there is air conditioning in the rear of the cabin: 15 Rear air conditioning control unit (N₂2/4) | |
| 70 | 30 | K/h 0.75 mm² | RDK system control unit (N88) | 10 |
| 71 | 30 | K/kch 2.5 mm² (from 09.2002 – K 6.0 mm²) | Control unit for left front seat adjustment with memory function (N32/1) (from 09.2002 – front left emergency seat belt tensioner (A76)) | 25 (since 09.2002 – 40) |
| 72 | 30 | To 2.5 mm² K/z 4.0 mm² | Rear left door control unit (N69/3) | 40 |
| 73 | 30 | K/f 2.5 mm² (since 09.2002 – K 6.0 mm²) | Control unit for right front seat adjustment with memory function (N32/2) (from 09.2002 – front right emergency seat belt tensioner (A76)) | 25 (since 09.2002 – 40) |
| 74 | 30 | To 4.0 mm² K/g 4.0 mm² | Rear right door control unit (N69/4) | 40 |
| 75 | 15 | Black 1.5 mm² | If Parktronic system is present (code 220a): PTS system control unit (N62) | 10 |
| 76 | 30 | K/g 1.5 mm² | Cooling box in the back of the rear seat (A39/1) | 15 |
| 77 | 30 | K/h 2.5 mm² | Ceiling control panel (N70) | 40 |
Front panel
Models from 09.2002
Right front gearbox K40/8 engine compartment
Purpose of the relay
| Relay | Purpose A Windscreen wiper heating relay (K40/6kA) B Relay circuit 15 (K40/KB) C Circuit Relay 15 (K40/KC) D Relay 1 for longitudinal adjustment of the steering column (K40/6kD) E Relay 2 longitudinal adjustment of the steering column (K40/6kE) F Relay for injection/drainage pumps (K40/6kF) G Relay for positions 1 and 2 of windscreen wipers (K40/6kG) H Windscreen wiper ON/OFF relay (K40/6kH) I Relay 1 for steering column angle adjustment (K40/6kI) J Relay 2 for steering column angle adjustment (K40/6kJ) K Relay for electronic engine and chassis control systems (K40/7kK) L Starter relay (K40/7kL) M For diesel models only: CDI relay (K40/7kM) N Air pump relay (K40/7kN) O Air compressor relay (K40/7kO) P Sound signal relay (K40/7kP) Q Rear Window Curtain Relay (K40/5kQ) R Tow-away protection relay (K40/5kR) S Relay circuit 15 (K40/5kP) T Fuel pump relay (K40/5kP) U Rear Window Defogger Relay (K40/5kU) V Motronic relay (K40/8kV) W Air boost relay (K40/8kW) X In-tank fuel pump relay (only AMG) (K40/8kX) |
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