PTC Heater, Basic Function - GF83.70-P-2009A
Model 118, 177, 247 with engine 608, 654
Model 167 with engine 264, 274, 654, 656
Except Code 581 (Automatic air conditioning)
Model 167.9 with engine 256
Except Code 581 (Automatic air conditioning)
Model 167
With Code 581 (Automatic air conditioning)
Model 213 with engine 264, 274
as of model year 2021
With Code 401 (Climatised front seats)
Except Code 913 (Hot country code)
Except Code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))
Model 213 with engine 264, 274
as of model year 2021
With Code 824 (Add.parts for countries w.low temperatures)
Except Code 913 (Hot country code)
Except Code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))
Model 213 with engine 264, 274
as of model year 2021
With Code 873 (Left and right driver's seat heating)
Except Code 913 (Hot country code)
Except Code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))
Model 213 with engine 264, 274
as of model year 2021
With Code 902 (Seat heater Plus for driver and front passenger)
Except Code 913 (Hot country code)
Except Code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))
Model 213 with engine 642, 654, 656
as of model year 2021
Except Code 913 (Hot country code)
Except Code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))
Model 223 with engine 176, 256, 656
Model 238 with engine 642
as of model year 2021
Except Code 913 (Hot country code)
Model 238, 257 with engine 264, 274
as of model year 2021
With Code 401 (Climatised front seats)
Except Code 913 (Hot country code)
Model 238, 257 with engine 264, 274
as of model year 2021
With Code 824 (Add.parts for countries w.low temperatures)
Except Code 913 (Hot country code)
Model 238, 257 with engine 264, 274
as of model year 2021
With Code 873 (Left and right driver's seat heating)
Except Code 913 (Hot country code)
Model 238, 257 with engine 264, 274
as of model year 2021
With Code 902 (Seat heater Plus for driver and front passenger)
Except Code 913 (Hot country code)
Model 238, 257 with engine 654, 656
as of model year 2021
Except Code 913 (Hot country code)
Model 247 with engine 260, 282
For countries with FMVSS certification
Overview
This document contains information on:
- General
- Location
- Function requirement
- PTC heater booster function
General
The more efficient a combustion engine is, the less usable thermal energy is available from the coolant for heating. In order to still achieve the required level of heating comfort in the passenger compartment (particularly with a cold combustion engine), some models are equipped with a PTC heater booster on a market-dependent basis. This supplies the generated heat directly to the air flowing into the vehicle interior.
The climate control control system controls the PTC heater booster depending on the requested heating output.
Location
The PTC heater booster (1) is located in the air conditioner housing in front of the heater core. Depending on the vehicle and equipment installed, a second PTC heater booster (1) is located in the rear passenger compartment.
Function requirement
- Circuit 30t ON
PTC heater booster function (1)
The PTC heater booster (1) consists of a heating register with PTC heater sections and a power regulator. A PTC section comprises several ceramic heater elements with a metallic frame. The metallic frame is provided with ribbing on the enlarged surface.
Energization of the heating elements of the PTC heater booster (1) causes them to heat up. The fresh air drawn in flows directly through the PTC heater booster (1) and is warmed up.