Designation of electrical units/components
 | Lamp |
 | item No |
 | Switch |
 | Pump/electric motor |
 | Multi-position dual switch |
 | Grounding |
 | Fuse/fuse link |
 | Connector (1 terminal) |
 | Meter |
 | Resistor |
 | Diode |
 | Potentiometer |
 | Chain knot |
 | Connected wires |
 | Electromagnetic actuator |
 | Color designation of electrical wiring insulation (yellow with green stripes) |
 | Output to another circuit (diagram 3, coordinates B2; the arrow indicates the direction of the current) |
 | Alternative connections |
 | Shielded cable |
 | The dotted line indicates the boundaries of a larger component that contains an electronic or solid-state element |
| G2/9 | connector designation |
| 30 | standard terminal designation (positive battery terminal) |
 | A permanently live wire (double line) |
 | Permanent direct grounding (bold line) |
 | Connecting wire (thin line) |
Grounding points to ground
| E1 | On the right side of the engine block |
| E2 | On the right side of the engine compartment |
| E3 | On the cylinder head |
| E4 | On the fuel injection pump (diesel models) |
| E5 | Near the steering column |
| E6 | Near the left rear combination light |
| E7 | On the left side of the engine compartment |
| E8 | On the gearbox |
| E9 | In the wiring harness of the Mono-Motronic injection system |
| E10 | On the right side of the engine block |
Standard terminal designations
| 15 | Ignition switch position "ignition" |
| 30 | Positive terminal of the battery |
| 31 | Weight |
| 50 | Ignition switch "start" position |
| 85 | Relay coil input |
| 86 | Grounding of the relay winding |
| 87 | Relay output signal |
| 87a | Relay output signal |