Mercedes E class w123 (240D, 300D, 300TD, 280E and several other models of Mercedes copes, sedans and wagons from model years 1977 – 1985) – fuse box diagram (123 545 11 00)
Year of production: 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985
Fuse box
| Fuse | Ampere rating [A] | Colour | Description |
| a | 16 | red | (Window lift front right and rear left) |
| b | 16 | red | (Window lift front left and rear right) |
| c | 16 | red | (Auxiliary fan) |
| d | 16 | red | (Sliding roof) |
| 1 | 8 | white | Parking/tail lights right/warning buzzer/license plate/instrument/hazard warning switch/heater and ventilation controls/rocker switches/shaft indicator (electronic radio)-illumination |
| 2 | 8 | white | Clock, trunk light, diagnostic, switch-over valve seat back arrester, roof light front and rear, hazard warning system, automatic anenna, illuminated vanity mirror, warning monitor term 5, (electronic radio) |
| 3 | 8 | white | Parking and tail light left |
| 4 | 8 | white | Cigar lighter, glove compartment light, outside mirror, radio |
| 16 | red | Seat heating front | |
| 5 | — | — | Not used |
| 6 | 16 | red | Windshield wiper and washer, optical horn |
| 7 | 8 | white | High beam right |
| 8 | 25 | blue | Blower motor, air conditioning compressor |
| 9 | 8 | white | High beam left, high beam indicator |
| 10 | 16 | red | Heated rear window (auxiliary heating rear) |
| 25 | blue | Seat heating rear | |
| 11 | 16 | red | Low beam right, fog light |
| 12 | 8 | white | Stop lamp, turn signal lamp, instrument cluster, relay window lift term. 86, cruise control, tachometer |
| 13 | 8 | white | Low beam left |
| 14 | 8 | white | Back-up lamp, warning monitor terminal 8, emission control, horn, switch – over valve overload protection device, autom. transmission relay auxiliary fan. term. 86, control unit/water pump/heating water valve for climate system |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.