Stationary heater (STH), function - GF83.70-G-0006A

MODEL 463 as of 1.6.94 with CODE (H12) Auxiliary heater Webasto Tele Thermo Top S

Coolant circuit schematic

Engine 606 D30LA and 603 D35A with Webasto Tele Thermo Top S stationary heater

Fig 1: Stationary Heater (STH) Function Diagram - Engine 606 D30LA And 603 D35A

Courtesy of MERCEDES-BENZ USA

Coolant circuit schematic

Engine 104 E32 with Webasto Tele Thermo Top S stationary heater

Fig 2: Stationary Heater (STH) Function Diagram - Engine 104 E32

Courtesy of MERCEDES-BENZ USA

The Tele Thermo Top S heater is a compact water heater with small dimensions.

Connected to the engine coolant circuit during the cold season the heater provides for:

Moreover, it is possible to ventilate the passenger compartment before driving (stationary ventilation).

The use of the heater reduces

the accident risk by ensuring good vision when starting a trip,
mechanical wear of the vehicle engine resulting from cold operation,
fuel consumption while protecting the environment by reducing emissions when the preheated engine is started

The stationary heater is controlled by the stationary heater timer (N34) in the center console or with the associated radio remote control.

All components required for generating heat and for heat exchange are integrated into the heater. They are subdivided into four function groups

An external fuel metering pump (Y23) is located in the area of the vehicle fuel tank for supplying fuel to the heater.

The heater version depends on the fuel, gasoline or diesel available.