Fuse Box Diagram & Relay Catalog • Years 1985 – 2009
Fuse Box Diagram Mercedes-Benz W124, C-Class (W202 / W203) & E-Class (W210 / W211) – Fuse Box Location & Amperage
Did the 12V cigarette lighter socket, washer pump, wipers or headlights stop working in your Mercedes-Benz W124, C-Class (W202 / W203) & E-Class (W210 / W211) ? Here you will find the exact location of both fuse boxes, fuse amperage ratings (A) and blade fuse types.
📍 1. Interior Cabin Fuse Box (Dashboard)
Located under the dashboard on the driver's side (behind the side dashboard trim panel when the door is open, or behind the storage compartment below the steering wheel). Protects 12V sockets, radio, wipers, power windows and central locking.
📍 2. Engine Bay Fuse & Relay Box
Located under the hood next to the car battery (12V 95Ah or 100Ah (W211 also has a small 12V 12Ah auxiliary battery for SBC brakes!)). Contains main high-current maxi fuses (40A–80A), glow plug relay, radiator cooling fan relay, ABS/ESP pump fuses and ECU main relay.
Most Common Fuses & Electrical Circuits (Mercedes-Benz W124, C-Class (W202 / W203) & E-Class (W210 / W211)):
🔋 Car Battery Specification for Mercedes-Benz W124, Class C →| Protected Circuit / Component | Fuse Rating & Color | Fuse Box Location | Symptom When Blown |
|---|---|---|---|
| 🔥 Cigarette Lighter / 12V Power Socket (Front & Trunk) | 15 A (blue) or 20 A (yellow) | Cabin (under dashboard) | Phone charger, dashcam or tire inflator does not work. |
| 🌧️ Front & Rear Wipers + Washer Pump Motor | 15 A (blue) / 20 A (yellow) / 25 A | Cabin / Engine Bay Box | Wipers do not move or washer pump blew fuse due to frozen fluid in winter. |
| 🔑 Central Locking, Power Windows & Heated Mirrors | 20 A (yellow) to 30 A (green) | Cabin (BCM comfort module) | Power windows do not operate or doors/trunk fail to lock. |
| ♨️ Heated Rear Window & Heated Front Seats | 25 A (clear/white) or 30 A (green) | Cabin (lower fuse row) | Heated seats do not warm up or rear window defroster fails. |
| 📻 Car Radio, Infotainment, USB & Instrument Cluster | 7.5 A (brown) / 10 A (red) / 15 A | Cabin + mini fuse on back of radio unit | Blank infotainment screen or unpowered OBD2 diagnostic port. |
| 💡 Low Beam, High Beam & Fog Lights (H7) | 10 A (red) or 15 A (blue) | Engine Bay Box / Cabin | Left or right headlight side stays dark even after installing a new bulb. |
| ⛽ Fuel Pump, Ignition Coils & ECU Main Relay | 15 A (blue) or 20 A (yellow) | Engine bay box next to battery | Starter cranks normally, but engine does not fire (no fuel delivery). |
| ❄️ Cabin Heater Blower & Radiator Cooling Fan | 30 A (green) to 50 A (Maxi fuse) | Engine Bay Box / Cabin | Cabin A/C blower does not blow air or engine overheats in traffic. |
Complete technical data cards by engine for Mercedes-Benz W124, C-Class (W202 / W203) & E-Class (W210 / W211):
Mercedes-Benz • 1985 – 2009
Mercedes-Benz W124, C-Class (W202 / W203) & E-Class (W210 / W211) – 180 / 200 / 230 Kompressor (95 kW / 105 kW / 120 kW / 135 kW)
🔋 Battery: 12V 95Ah or 100Ah (W211 also has a small 12V 12Ah auxiliary battery for SBC brakes!) • 💡 Žárovky: H7
Mercedes-Benz • 1985 – 2009
Mercedes-Benz W124, C-Class (W202 / W203) & E-Class (W210 / W211) – 200 CDI / 220 CDI (75 kW / 85 kW / 105 kW / 110 kW / 125 kW)
🔋 Battery: 12V 95Ah or 100Ah (W211 also has a small 12V 12Ah auxiliary battery for SBC brakes!) • 💡 Žárovky: H7
Mercedes-Benz • 1985 – 2009
Mercedes-Benz W124, C-Class (W202 / W203) & E-Class (W210 / W211) – 250 D / 270 CDI / 300 TD (83 kW / 125 kW / 130 kW)
🔋 Battery: 12V 95Ah or 100Ah (W211 also has a small 12V 12Ah auxiliary battery for SBC brakes!) • 💡 Žárovky: H7
Mercedes-Benz • 1985 – 2009
Mercedes-Benz W124, C-Class (W202 / W203) & E-Class (W210 / W211) – 320 CDI / 350 CDI V6 (145 kW / 150 kW / 165 kW / 195 kW)
🔋 Battery: 12V 95Ah or 100Ah (W211 also has a small 12V 12Ah auxiliary battery for SBC brakes!) • 💡 Žárovky: H7