Front Climate Control Operating Unit, Component Description - GF83.40-S-2260TRB
Model 447.6/7
Model 448.7
Shown With Code HH4 (THERMOTRONIC automatic air conditioning)
| Control element | Controllable function | Operating feedback |
|---|---|---|
| Left temperature selector wheel (S98s1) | Setting of specified temperature, left front | A/C operating unit display (S98p1) |
| "AUTO" button (S98s2) | Automatic mode ON/OFF | Integrated LED |
| Defrost button (S98s4) | Defrost mode ON/OFF | Integrated LED |
| Increase air flow button (S98s5) | Increase air volume | A/C operating unit display (S98p1) |
| "MODE" up button (S98s6) | Air distribution up | A/C operating unit display (S98p1) |
| Air recirculation mode button (S98s7) | Air recirculation mode ON/OFF | Integrated LED |
| "REAR" button (S98s9) | Switch between front and rear climate control zone | Integrated LED |
| Right temperature selector wheel (S98s8) | Setting of specified temperature, right front | A/C operating unit display (S98p1) |
| "SYNC" button (S98s10) | Driver/front passenger climate zone ON/OFF | Integrated LED |
| "A/C" button (S98s11) | Refrigerant compressor with magnetic clutch (A9/10) ON/OFF | Integrated LED |
| Reduce air flow button (S98s13) | Reduce air volume | A/C operating unit display (S98p1) |
| Rear window heater button (S98s14) | Rear window heater (R1) (without CODE W64 (Rear window to be opened separately)) or rear window heater (R1/3) (with CODE W64 (Rear window to be opened separately)) ON/OFF | Integrated LED |
| "REST" residual heat button (S98s3) | Residual heat utilization ON/OFF | Integrated LED |
| "MODE" down button (S98s12) | Air distribution down | A/C operating unit display (S98p1) |
Shown With Code HH9 (Semi-automatically regulated air conditioning, TEMPMATIC)
| Control element | Controllable function | Operating feedback |
|---|---|---|
| Temperature selector wheel (S98s15) | Setting of specified temperature | - |
| "REAR" button (S98s9) | Switch between front and rear climate control zone | Integrated LED |
| Windshield air distribution button (S98s16) | Windshield air distribution | Integrated LED |
| Air recirculation mode button (S98s7) | Air recirculation mode ON/OFF | Integrated LED |
| Air volume selector wheel (S98s19) | Increase/reduce air volume | - |
| "A/C" button (S98s11) | Refrigerant compressor with magnetic clutch (A9/10) ON/OFF | Integrated LED |
| Rear window heater button (S98s14) | Rear window heater (R1) (without CODE W64 (Rear window to be opened separately)) or rear window heater (R1/3) (with CODE W64 (Rear window to be opened separately)) ON/OFF | Integrated LED |
| Center air distribution button (S98s17) | Center air distribution | Integrated LED |
| Footwell air distribution button (S98s18) | Footwell air distribution | Integrated LED |
Location
The air conditioning control and operating unit (front & rear AAC [KLA]) is located in the center console.
Task
The air conditioning control and operating unit (front & rear AAC [KLA]) has the following tasks:
- Reception of signals and requests
- Transmission of signals and requests
Reception of signals and requests
The air conditioning control and operating unit (front & rear AAC [KLA]) receives requests for function feedback via interior CAN (CAN B) for following functions:
- Climate control
- Recirculated air mode
- Windshield defrost function
- Rear window heater
- Stationary heater (with CODE H12 (Auxiliary water heater))
Transmission of signals and requests
The air conditioning control and operating unit (front & rear AAC [KLA]) sends function requests via interior CAN, which can be selected via the different controls.
| Wiring diagram for automatic air conditioning (AAC [KLA]) | Model 448.7 with code HH4 (THERMOTRONIC automatic climate control) | PE83.40-S-2000-97VDB | |
| Model 447.6/7 with code HH4 (THERMOTRONIC automatic climate control) Model 447.6/7 with code HH9 (Air conditioner, automatic heater control) | PE83.40-S-2000-97VVB | ||
| Overview of system components for climate control | GF83.40-S-9994TRB |