Mercedes S Class w140 (1997) – fuse box diagram
Year of manufacture: 1997
Fuse box at the front
| Fuse | Rating in amperes | Color | Description |
| 1 | Empty | ||
| 2 | 30 | Light green | Auxiliary fan |
| 3 | 40 | Amber | Timing function relay, wiper motor |
| 4 | Blank | ||
| 5 | 40 | Amber | Power fuse, fuse box in rear compartment |
| 6 | 40 | Amber | (Electric air pump) |
| 7 | 7,5 | brown | (Headlight range adjustment) |
| 8 | 7,5 | brown | Parking light / left rear light + SML |
| 9 | 15 | Light blue | Parking / right tail, license plate light. + SML, headlamp washer / wiper system, daytime running lights |
| 10 | 7,5 | brown | Rear fog light |
| 11 | 15 | Light blue | Left dipped headlights |
| 12 | 15 | Light blue | Right dipped beam |
| 13 | 7,5 | brown | Left high beam, high beam indicator |
| 14 | 7,5 | brown | Right high beam, daytime running lights |
| 15 | 15 | Light blue | Radio, dual-spring belt control, make-up mirror (seat heating, on-board computer), front blinker, wiper/washer – system, airbag fault indication. rain sensor |
| 16 | 15 | Light blue | Lighter, light glove |
| 17 | 20 | Yellow | Instrum. cluster, turn signal / hazard warning. Blinker, ceiling light (steering angle sensor), for diesel: key off |
| 18 | 15 | Light blue | Automatic air conditioning (on-board computer) |
| 19 | 7,5 | Brown | Seat belt speed warning device |
| 20 | 10 | Red | Air conditioning control unit and compressor, automatic air conditioning, daytime running light control unit |
| 21 | 20 | Yellow | Wipe/wash heater, exterior mirror, tr. oil cooler, automatic air conditioning |
| 22 | 15 | Light blue | Ignition coils |
| 23 | 7,5 | brown | Stop light, ASR switch, cruise control-temperature control |
| 24 | 7,5 | brown | Instrument cluster, bulb control unit, daytime running ceiling light, (magnetic air pump), glare protection |
| 25 | 15 | Light blue | Backip lamp, HMS-SFI (Motronic) automatic transmission switch valve control, fanfare horns |
| 26 | 10 | Red | Fog light |
| 27 | Blank | ||
| 28 | 7,5 | brown | Automatic antenna |
| 29 | 20 | Yellow | (Load current, front seat heating) |
| 30 | 20 | Yellow | Seat adjustment memory, steering wheel / mirror adjustment. memory, steering wheel adjustment, mirror adjustment, |
| 31 | 30 | Light green | (Rear bench seat, head restraints) not for Coupe |
| (Individual rear seat with head restraints, left), not for Coupe | |||
| 32 | 30 | Light green | (Individual rear seat with headrest, right), not for Coupe |
| 7,5 | brown | Rear head restraints left, right (Coupe only) | |
| 33 | Blank | ||
| 34 | 7,5 | brown | Saf. Belt transfer arm. (coupe), (front seat heater). |
| 35 | 15 | Light blue | (Sunshade), relay comfort circuit |
| 36 | Blank | ||
| 37 | 30 | Light green | Left front seat adjustment |
| 38 | 30 | Light green | Front left seat adjustment |
| 39 | Blank | ||
| 40 | 30 | Light green | Right front seat adjustment |
| 41 | 30 | Light green | Front right seat adjustment |
Rear fuse box
| Fuse | Rating in amperes | Color | Description |
| 1 | 15 | Light blue | (Rear air conditioner) |
| 2 | 7,5 | brown | Anti-theft locking system, infrared remote control, (rear seat heater) |
| 3 | 20 | Yellow | Centr. lock. syst., locking system. Assist., cig. lighter, rear |
| 4 | Empty | ||
| 5 | 30 | Light green | Windshield lifter |
| 6 | 30 | Lighter green | Windshield lifter |
| 7 | 7,5 | brown | Rear cosmetic mirror lighting |
| 10 | Red | Rear cosmetic mirror lighting, (refrigerator) | |
| 8 | Blank | ||
| 9 | 30 | Light green | (Closing assistance system) |
| 10 | 7,5 | brown | (Telephone) |
| 11 | 20 | Yellow | Window lifter, trunk light, central locking system, (ceiling/reading light, rear) |
| 12 | 20 | Yellow | (Load current, rear seat heating) |
| 13 | 30 | Light green | Fuel pump |
| 14 | 25 | White | (Sliding roof) |
| 15 | 25 | White | Sy / infrared remote control, rear headrests |
| 16 | 30 | Light green | Tuner, amplifier, sound system |
| 17 | Blank |
WARNING: Terminal and wire harness assignments for individual connectors will vary depending on vehicle equipment level, model and market.