Mercedes S Class w140 (1997) – fuse box diagram
Year of production: 1997
Front fuse box
| Fuse | Ampere rating | Colour | Description |
| 1 | Vacant | ||
| 2 | 30 | Light green | Auxiliary fan |
| 3 | 40 | Amber | Time function relay, wiper motor |
| 4 | Vacant | ||
| 5 | 40 | Amber | Power fuse, rear compartment fuse box |
| 6 | 40 | Amber | (Electric airpump) |
| 7 | 7,5 | Brown | (Headlamp range adjustment) |
| 8 | 7,5 | Brown | Parking/tail light, left + SML |
| 9 | 15 | Light blue | Parking/tail, right, license plate illumin. + SML, headlamp wash/wiper system, daytime running lights |
| 10 | 7,5 | Brown | Rear fog light |
| 11 | 15 | Light blue | Low beam, left |
| 12 | 15 | Light blue | Low beam, right |
| 13 | 7,5 | Brown | High beam left, high beam indicator |
| 14 | 7,5 | Brown | High beam right, daytime running lights |
| 15 | 15 | Light blue | Radio, dual – spring belt control, rear make-up mirror (seat heating, trip computer), head flasher, wiper/washer – system, airbag fault indicat. rain sensor |
| 16 | 15 | Light blue | Cigar lighter, glove comp. light |
| 17 | 20 | Yellow | Instrum. cluster, turn signal/hazard warn. flasher, ceiling light (steering angle sensor), for diesel: key shut-off |
| 18 | 15 | Light blue | Automatic climate control, (trip computer) |
| 19 | 7,5 | Brown | Seatbelt speed warning device |
| 20 | 10 | Red | Control unit and A/C compressor, automatic climate control, control unit daytime running lights |
| 21 | 20 | Yellow | Heating wipe/wash system, outside mirror, tr. oil cooler, automatic climate control |
| 22 | 15 | Light blue | Ignition coils |
| 23 | 7,5 | Brown | Stop lamp, ASR switch, tempomat-cruise control |
| 24 | 7,5 | Brown | Instrument cluster, bulb control unit, ceiling light daytime running lights, (magnetic cluch-air pump), anti-dazzle-device |
| 25 | 15 | Light blue | Backip lamp, automatic transmission HMS-SFI (Motronic) switchover valve control, fanfare horns |
| 26 | 10 | Red | Fog lamp |
| 27 | Vacant | ||
| 28 | 7,5 | Brown | Automatic aerial |
| 29 | 20 | Yellow | (Load current, front seat heating) |
| 30 | 20 | Yellow | Seat adjustm. memory, steering wheel/mirror adjust. memory, steering wheel adjustment, mirror adjustmen, |
| 31 | 30 | Light green | (Rear seat bench, head restraints) not for Coupe |
| (Individual rear seat with head restraint, left), not for Coupe | |||
| 32 | 30 | Light green | (Individual rear seat with head restraint, right), not for Coupe |
| 7,5 | Brown | Rear head restraints left, right (only Coupe) | |
| 33 | Vacant | ||
| 34 | 7,5 | Brown | Saf. belt handover arm. (coupe), (front seat heater) |
| 35 | 15 | Light blue | (Sun blind), relay comfort circuity |
| 36 | Vacant | ||
| 37 | 30 | Light green | Front left seat adjustment |
| 38 | 30 | Light green | Front left seat adjustment |
| 39 | Vacant | ||
| 40 | 30 | Light green | Front right seat adjustment |
| 41 | 30 | Light green | Front right seat adjustment |
Rear fuse box
| Fuse | Ampere rating | Colour | Description |
| 1 | 15 | Light blue | (Rear air conditioner) |
| 2 | 7,5 | Brown | Anti-theft locking syst., infared remote control, (rear seat heating) |
| 3 | 20 | Yellow | Centr. lock. syst., closing syst. aid., cig. lighter, rear |
| 4 | Vacant | ||
| 5 | 30 | Light green | Window lift |
| 6 | 30 | Lighter green | Window lift |
| 7 | 7,5 | Brown | Vanity mirror illumination, rear |
| 10 | Red | Vanity mirror illumination, rear, (refrigerator-box) | |
| 8 | Vacant | ||
| 9 | 30 | Light green | (Closing aid system) |
| 10 | 7,5 | Brown | (Telephone) |
| 11 | 20 | Yellow | Window lift, luggage compartment light, central locking syst., (celling/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 | Anti-theft locking sy./infrared remote control, rear head restraints |
| 16 | 30 | Light green | Tuner, amplifer, sound system |
| 17 | Vacant |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.