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Home >> Mercedes Benz >> 2021 >> GLA250 Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System -- 247 Chassis >> Wiring Diagrams >> Function Schematic For Actuating PTC Heater Booster >> Function Schematic For Actuating PTC Heater Booster - PE83.70-P-2502-97A

Function Schematic For Actuating PTC Heater Booster - PE83.70-P-2502-97A

Model 118, 177, 247 with engine 608, 654 

Model 247 with engine 260, 282 For countries with FMVSS certification 

Code: Designation: Position:
1 Operation, signal 22C
1 Operation, signal 14B
1 Operation, signal 22A
10 PTC heater booster, actuation 28E
2 Coolant temperature, signal 22C
2 Coolant temperature, signal 14D
2 Coolant temperature, signal 8D
3 Circuit 15, status 21C
4 Interior temperature, signal 22E
5 Air outlet temperature sensor, signal 22F
6 Crash, signal 22H
7 Dew point temperature, signal 22J
8 Solar radiation, signal 22J
9 Outside temperature, signal 22K
A26/17 Head unit 1D
B10/31 Left side air vent air outlet temperature sensor 1F
B10/32 Right side air vent air outlet temperature sensor 1G
B10/35 Left footwell vent air outlet temperature sensor 1F
B10/36 Right footwell vent air outlet temperature sensor 1G
B14 Outside temperature sensor 1L
B38/2 Rain/light sensor with additional functions 1J
CAN B Interior CAN 20D
CAN B Interior CAN 20E
CAN C CAN for engine 7E
CAN HMI User interface CAN 10C
Code 545 Connect 5 (NTG6) 1B
Code 547 Connect 20 Entry (NTG6) 1C
Code 548 Connect 20 MID (NTG6) 1C
Code 549 Connect 20 HIGH (NTG6) 1D
Code 581 THERMOTRONIC automatic air conditioning 1G
Flex E Chassis FlexRay 13E
LIN B16 Rain and light sensor LIN 20J
LIN B16 Rain and light sensor LIN 10J
LIN B8-1 LIN 1 for climate control system 27F
LIN B8-3 LIN 3 for climate control system 20A
LIN B8-3 LIN 3 for climate control system 10A
N10 Central control module 24F
N127 Drivetrain control unit 10F
N166 Head unit/instrument cluster control unit 1B
N2/10 Supplemental restraint system control unit 1H
N3/10 ME-SFI [ME] control unit 1E
N3/9 CDI control unit 1E
N58/1 Climate control operating unit 1A
N70 Overhead control panel control unit 16F
N73 Electronic ignition switch control unit 16D
R22/3 PTC heater booster 30G
G16065280Courtesy of MERCEDES-BENZ USA
G16065281Courtesy of MERCEDES-BENZ USA