- E9 - heater fan switch;
- E15 - Rear window heating switch;
- F51 - overheating protection unit;
- L16 - heater control panel illumination lamp;
- N₂4 - Heater fan safety resistor with overheating protection;
- S16-S18 - fuses on the relay board;
- T4 - 4-pin connector (black) behind the instrument panel;
- T6 - 6-pin connector (red) behind the instrument panel;
- T10a - 10-pin connector (brown) behind the dashboard;
- V2 - heater fan;
- Z1 - heated rear window;
- 41 - ground point under the rear shelf;
- 81 - connection to ground 1 in the instrument panel wiring harness
[This publication is borrowed from the resource: audimanual.ru]