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

MODEL 117, 156, 176, 246 

The presentation is just an example 

Fig 1: Identifying Display - Instrument Cluster And Interior Illumination Screen

Courtesy of MERCEDES-BENZ USA

	Check
1	Switch on ignition and check preglow indicator lamp (2)	If installed. The preglow indicator lamp (2) must remain lit corresponding to the coolant temperature and then go out. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
2	Check coolant temperature gauge (5) and coolant temperature warning lamp (4)	The pointer of the coolant temperature gauge (5) must indicate the current coolant temperature and the coolant temperature warning lamp (4) must light up. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
3	Check fuel level indicator (10)	The pointer of the fuel level indicator (10) must indicate the current fuel level in the fuel tank. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
4	Switch on exterior lights manually
5	Check instrument illumination	All pointer instruments (3, 5, 10, 11) must be illuminated and the background illumination of all displays (7, 8, 9, 13, 14) must have been switched on. If there are problems: Determine and rectify cause, subject to separate repair order.
6	Operate instrument illumination brightness control (12)	The instrument illumination must become brighter or dimmer accordingly. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
7	Check displays (7, 8, 9, 13, 14) for visible pixel faults	If the displays (7, 8, 9, 13, 14) exhibit vertical stripes, missing segments or black dots: ↓ Determine and rectify cause, subject to separate repair order.
8	Switch on front fog lamps	If installed. The front fog lamp indicator lamp (6) must light up. If there are problems: ↓ Determine and rectify cause, subject to separate repair order.
9	Switch off exterior lights manually
10	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.
11	Switch off lamps in passenger compartment and ignition