Check audible warning system - AP54.30-P-5450TX

MODEL 219 with Sensotronic Brake Control (SBC) 

Fig 1: Identifying Rotary Light Switch And Standing Lamps

Courtesy of MERCEDES-BENZ USA

	Checking
1	Remove key from the ignition lock
2	Turn main light switch (S1) into the position "standing light On" (2)
3	Open driver door	A warning chime must sound, otherwise: ↓ Repair against a separate order.
4	Turn main light switch (S1) into position "light Off" (1)