S 550 (221.171) V8-5.5L (273.961) (2007)
Activate departure time
To activate a departure time the ON button has to be pressed after calling up the required time.
When activating the departure time, the stationary heater queries the component status and performs a component test if required.
Depending on the result, either the activated departure time is shown on the display or a fault message.
Deactivate departure time
All it takes to deactivate any departure time is calling up the departure time 1 and pressing the OFF button with a wireless connection established. After
deactivation the display shows the operating condition.
Query operating condition
The operating condition can be queried at any given time with a single press of one of the arrow buttons on the stationary heater transmitter, irrespective
of the manner in which the stationary heater is activated. The corresponding stationary heater status is shown on the display.
GF83.70-P-4205SX STH Switchover Valve Component Description
GF83.70-P-4205SX STH Switchover Valve Component Description
- with CODE (228) Stationary heater
Component Identification
Location
The STH switchover valve is located in the front right wheel well next to the STH or HB heater unit (A6) on model 221 or the STH heater unit (A6) on
model 216.
Task
The STH switchover valve regulates the flow of coolant (small or large coolant circuit).
Actuation on model 221 is conducted by the STH or HB control unit (A6n1) or on model 216 by the STH control unit (A6n1).