Check lamps in instrument cluster and interior illumination - AP54.30-P-5453RK

MODEL 231 

Fig 1: Display - Instrument Cluster And Interior Illumination Lamps

Courtesy of MERCEDES-BENZ USA

	Check
1	Switch on ignition and check SPORT indicator lamp (4)	If installed. The SPORT indicator lamp (4) must light up. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
2	Operate parking brake	The parking brake indicator lamp (1) must light up. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
3	Check coolant temperature gauge (7) and coolant temperature warning lamp (6)	The pointer of the coolant temperature gauge (7) must indicate the coolant temperature accordingly and the coolant temperature warning lamp (6) must light up. If there are problems: ↓
		Determine and rectify cause, subject to separate repair order.
4	Check warning lamp tire pressure monitor (8)	If installed. The tire pressure monitor warning lamp (8) must light up. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
5	Check fuel level indicator (10)	The pointer of the fuel level indicator (10) must display the fuel level in the fuel tank accordingly. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
6	Manually switch on the exterior lights
7	Check instrument illumination	All pointer instruments (5, 7, 10, 11) must be illuminated and the background illumination for the existing displays (2, 3, 9,) must be activated. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
8	Check brightness setting for instrument illumination	Adjust brightness of instrument illumination through the menu in the instrument cluster (A1): Settings Light Display/switch brightness The instrument illumination must be brighter or darker to match. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
9	Check displays (2, 3, 9) for visible pixel errors	If the displays (2, 3, 9) exhibit true vertical strips, missing segments or black dots: ↓ Determine and rectify cause, subject to separate repair order.
10	Manually switch off exterior lights
11	Switch on lamps in passenger compartment and check for proper operation	Check inside rearview mirror, reading, mirror and glove compartment lamps. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
12	Switch off lamps in passenger compartment and ignition