| E9 | Fresh air blower switch |
| E537 | Immediate heat button |
| J162 | Heater control unit |
| J519 | Onboard power supply control unit |
| N24 | Fresh air blower series resistor with overheating fuse |
| T4l | 4-pin connector, at fresh air blower series resistor |
| T5f | 5-pin connector, at fresh air blower switch |
| T10e | 10-pin connector, behind dash panel |
| T20b | 20-pin connector, on the heating and fresh air control |
| V2 | Fresh air blower |
| 617 | Earth point -2-, on lower part of right A-pillar |
| L32 | Connection -1-, in heater wiring harness |
| L34 | Connection -2-, in heater wiring harness |
| E9 | Fresh air blower switch |
| E537 | Immediate heat button |
| J301 | Air conditioning system control unit |
| J519 | Onboard power supply control unit |
| N24 | Fresh air blower series resistor with overheating fuse |
| T4l | 4-pin connector, at fresh air blower series resistor |
| T5f | 5-pin connector, at fresh air blower switch |
| T10e | 10-pin connector, behind dash panel |
| T20f | 20-pin connector, at air conditioning system control unit (black) |
| V2 | Fresh air blower |
| 617 | Earth point -2-, on lower part of right A-pillar |
| B397 | Connection -1- (CAN H, convenience), in interior wiring harness |
| B406 | Connection -1- (CAN L, convenience), in interior wiring harness |
| L5 | Connection -1-, in air conditioner wiring harness |
| L6 | Connection -2-, in air conditioner wiring harness |
| J13 | Fresh air blower relay, at additional relay holder above the onboard power supply control unit |
| J162 | Heater control unit |
| J301 | Air conditioning system control unit |
| J364 | Additional heater control unit |
| J485 | Auxiliary heater operation relay, at additional relay holder above the onboard power supply control unit |
| J519 | Onboard power supply control unit |
| SC16 | Fuse -16-, in fuse holder |
| SC25 | Fuse -25-, in fuse holder |
| SC40 | Fuse -40-, in fuse holder |
| SC47 | Fuse -47-, in fuse holder |
| T8v | 8-pin connector, at additional heater control unit |
| 367 | Earth connection -2-, in interior wiring harness |
| A20 | Positive connection -1- (15a), in dash panel wiring harness |
| B327 | Positive connection -13- (30a), in interior wiring harness |
| J364 | Additional heater control unit |
| J519 | Onboard power supply control unit |
| N279 | Heater coolant shut-off valve |
| SB11 | Fuse -11-, in the E box |
| T2j | 2-pin connector, at additional heater control unit |
| T8v | 8-pin connector, at additional heater control unit |
| T40a | 40-pin connector, at the E box |
| V54 | Metering pump |
| 43 | Earth point -1-, on lower part of right A-pillar |
| 124 | Earth connection, in engine compartment right wiring harness |
| 373 | Earth connection -8-, in interior wiring harness |
| 374 | Earth connection -9-, in interior wiring harness |
| *1 | only on certain vehicles, depending upon the engine identification characters |
| *2 | only on vehicles with heating |
| *3 | only for vehicles with left-hand drive |
| *4 | only for vehicles with right-hand drive |
| G18 | Temperature sensor |
| G189 | Overheating sensor |
| J364 | Additional heater control unit |
| J519 | Onboard power supply control unit |
| Q8 | Glow plug with flame monitor |
| T2k | 2-pin connector, at additional heater control unit |
| T3d | 3-pin connector, at additional heater control unit |
| T4e | 4-pin connector, at additional heater control unit |
| T8w | 8-pin connector, at additional heater control unit |
| V6 | Combustion air blower |
| V55 | Circulation pump |
| Z66 | Heater element for fuel preheating |
| * | for diesel engines |
| J119 | Multi-function display |
| J285 | Control unit in dash panel insert |
| J364 | Additional heater control unit |
| J519 | Onboard power supply control unit |
| J533 | Data bus diagnostic interface, below dash panel |
| K | Dash panel insert |
| T8v | 8-pin connector, at additional heater control unit |
| T20c | 20-pin connector, at data bus diagnostic interface |
| T32c | 32-pin connector, at dash panel insert |
| A178 | Connection (CAN H, infotainment), in dash panel insert wiring harness |
| A179 | Connection (CAN L, infotainment), in dash panel insert wiring harness |
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