Purpose/function of stationary heater timer - GF83.70-G-4007-02A

Stationary heater timer (N34) (Engine 104 E32, engine 603 D35A, engine 606 D30LA) 

Fig 1: Identifying Stationary Heater Timer Function (Engine 104 E32, Engine 603 D35A, Engine 606 D30LA)

Courtesy of MERCEDES-BENZ USA

Stationary heater timer (N34) 

(Engine 102 E30) 

Fig 2: Identifying Stationary Heater Timer Function (Engine 102 E30)

Courtesy of MERCEDES-BENZ USA

Purpose 

Along with radio remote control, stationary heater timer (N34)  is operating element of stationary heater.