The Smart Roadster was manufactured between 2003 and 2006. This article provides fuse box diagrams for each year model (2003, 2004, 2005, and 2006). It explains where you can find the fuse panels inside the car and details what each fuse and relay is assigned to.
Table of Contents
Cigar lighter (power outlet) fuse in the Smart Roadster is the fuse #21 in the Instrument panel fuse box.
Passenger Compartment
| Fuse Number | Description | Fuse Amp |
|---|---|---|
| 1 | Starter | 25 |
| 2 | Windscreen wipers, washer pump | 20 |
| 3 | Heater blower, seat heater | 20 |
| 4 | Power windows | 30 |
| 5 | Light switch | 7.5 |
| 6 | Parking lights/tail lights, right | 7.5 |
| 7 | Parking lights/tail lights, left | 7.5 |
| 8 | Terminal 87/3 master relay (engine) | 20 |
| 9 | Terminal 87/2 master relay (engine) | 10 |
| 10 | Terminal 87/1 master relay (engine) | 15 |
| 11 | Instrument cluster, safety cluster, OBD, Horn (only with leather sport steering wheel with steering wheel rocker switch system) | 7.5 |
| 12 | Radio CD, interior light | 15 |
| 13 | Fog lamps | 15 |
| 14 | ESP valves | 25 |
| 15 | Charge air cooler, Air conditioning compressor | 15 |
| 16 | Electric fuel pump | 10 |
| 17 | Rear window wiper | 15 |
| 18 | Airbag triggering device, ESP | 7.5 |
| 19 | Mirror adjustment | 7.5 |
| 20 | Radio, CD, instrument cluster, tachometer, OBD, backup lamp, CD changer | 15 |
| 21 | Power socket, Cigarette lighter | 15 |
| 22 | Low beam light, right | 7.5 |
| 23 | Low beam light, left | 7.5 |
| 24 | High beam light, right | 7.5 |
| 25 | High beam light, left/combined light | 7.5 |
| 26 | Brake light | 15 |
| 27 | Engine control unit | 7.5 |
| 28 | Rear window heater/engine fan | 30 |
| 29 | Soft top | 30 |
| 30 | Manual gearbox | 40 |
| 31 | Horn, central locking, rear lid remote unlocking | 30 |
| 32 | Secondary air injection pump (emission control) | 30 |
| 33 | Ignition switch | 50 |
| 34 | ESP control unit | 50 |
| 35 | Steering assist control unit | 30 |
| 36 | Backup fuse 15 | – |
| 37 | Backup fuse 15 (W450, glass sliding roof) | 15 |
| 38 | Backup fuse 15 | – |
| 39 | Backup fuse 15 | – |
| 40 | Backup fuse 30 | – |
| 41 | Backup fuse 30 | – |
| 42 | Backup fuse 30 | – |
| 43 | Backup fuse 30 | 25 |
| 44 | Backup fuse 30, seat heater | 25 |
| Relays | ||
| A | Wiper system relay | |
| B | Fog lamp relay | |
| C | Left heated seat control unit | |
| D | Right heated seat control unit |
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Tom Smith is a passionate car mechanic and automotive enthusiast, specializing in the intricate world of car fuse boxes. With years of hands-on experience under the hood, he has earned a reputation as a reliable expert in his field. As the founder and content creator of the popular blog website 'carsfuse.com,' Tom has dedicated himself to sharing his extensive knowledge of car fuse boxes and electrical systems with the world.