Check warning and function indicator lamps in instrument cluster - AP54.30-P-5451A

MODEL 190 

Fig 1: Identifying Warning And Function Indicator Lamps (Model 190)

Courtesy of MERCEDES-BENZ USA

	Preparatory tasks
1	Switch off engine and switch on ignition	Close the engine hood, the liftgate and all doors.
2	Operate parking brake
	Check
3	Check warning lamps (9, 11, 12, 13, 15, 17, 19, 20) and indicator lamps (1, 2, 3, 4, 5, 6, 7, 8, 10, 14, 16, 18) for proper operation	If there are problems: ↓ Rectify problem subject to separate repair order.
4	Manually switch on low beams	The low beams indicator lamp (4) must light up and a lamp failure message must not be displayed in the multifunction display (21). If there are problems: ↓ Rectify problem subject to separate repair order.
5	Switch on high beam	The high beams indicator lamp (3) must light up and a lamp failure message must not be displayed in the multifunction display (21). If there are problems: ↓ Rectify problem subject to separate repair order.
6	Switch on front fog lamps	The front fog lamps indicator lamp (18) must light up and a lamp failure message must not be displayed in the multifunction display (21).
7	Switch on rear fog lamp	The rear fog light indicator lamp (5) must light up and a lamp failure message must not be displayed in the multifunction display (21). If there are problems: ↓ Rectify problem subject to separate repair order.
8	Engage reverse gear and press service brake	There must be no lamp failure message in the multifunction display (21). If there are problems: ↓ Rectify problem subject to separate repair order.
9	Switch on hazard warning system	The left and right turn signal light indicator lamps (1, 2) flash in unison in the multifunction display. If there are problems: ↓ Rectify problem subject to separate repair order.
10	Switch off hazard warning system
	Finishing activity
11	Switch off ignition