Display monitoring/warning messages via indicator lamps, function - GF54.30-P-2011GZ

MODEL 164 with CODE (494) USA version

Fig 1: Display Monitoring/Warning Messages Via Indicator Lamps

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Up to production period 31.07.2006

As of production period 01.08.2006

Fig 2: Display Monitoring/Warning Messages Via Indicator Lamps

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Turn signal indicator lamps

As an optical check the left turn signal indicator lamp and right turn signal indicator lamp is integrated in the instrument cluster. These lamps are activated differently according to function.

When functioning as direction indicators, only one of the two indicator lamps is actuated at a time.

The signal for actuating the respective indicator lamp comes via the interior CAN from the steering column module (N80) to the SAM control unit (N10/8).

If one of the turn signal lamps fails, the triggered indicator lamp flashes at twice the frequency.

The left turn signal indicator lamp and right turn signal indicator lamp is actuated for hazard warning flashing and ATA flashing. The signal for actuating the lamps as hazard warning flashers comes over the interior compartment CAN from the upper control panel control unit (N72/1).

The signal for actuating the anti-theft alarm system flashing comes from the rear SAM control unit via the interior CAN.

While the direction indicator function is available only with "circuit 15 ON", the other flasher modes are also possible with "circuit 15 OFF". An acoustic signal accompanies the rhythmic flashing of the indicator lamp (A1h2).

When different demands for flasher operation are present, the system assigns hierarchical priorities in the following sequence:

Electronic alarm system flashers (highest priority)
Hazard warning flashers (2nd priority)
Turn indicators (3rd priority)

High beam indicator lamp

With high beam "ON" and headlamp flasher the actuation takes place via the interior CAN through the front SAM control unit (N10).

Fuel reserve indicator lamp

The fuel reserve warning lamp lights up as soon as the reserve level is reached. The actuation is closely linked to the fuel level and reserve indicator.

Brake fluid and parking brake warning lamp

This warning lamp is actuated if at the start of a journey the parking brake is not released or the minimal brake fluid level is not reached.

The signal for actuating the lamp comes from the front SAM control unit via the interior CAN.

Seat belt warning lamp

The seat belt warning lamp is actuated as follows:

The seat belt warning lamp lights up when "circuit 61 is ON", the vehicle speed is > 25 km/h and the driver seat belt buckle and seat belt warning switch (S68/1) is not connected. The seat belt warning lamp goes out as soon as the driver seat belt buckle and seat belt warning switch is closed.
The seat belt warning lamp lights up when "circuit 61 is ON", the vehicle speed is > 25 km/h, the front passenger seat occupied and child seat recognition sensor (B48) has detected a person or a child seat and the front passenger seat belt buckle and seat belt warning switch (S68/2) is not closed. The seat belt warning lamp goes out as soon as the front passenger seat belt buckle and seat belt warning switch is closed

Safety system lamps

The airbag indicator and warning lamp is actuated when there is a fault in the supplemental restraint system (SRS).

It is triggered directly by the restraint systems control unit (N2/7).

The ABS indicator lamp is actuated if there is a fault in the ABS. The signal for actuating the lamp comes via the engine compartment CAN from the ESP control unit (N47-5).

The signal to actuate the lamp comes from the ME-SFI control unit (N3/10) or CDI control unit (N3/9) via the engine compartment CAN.

Tire pressure monitor warning lamp

This lamp is only fitted on vehicles with tire pressure monitor code 475.

In addition to the multifunction display it lights up yellow, when a rapid pressure loss of ≥ 0.2 bar/min is detected.

The signal to activate the lamp is sent by the TPM [RDK] control unit (N88) via the interior CAN.

DTR warning lamp

This lamp is only fitted on vehicles with Distronic (DTR) Code 219. In addition to the red multifunction display it lights up when a minimum distance previously set by the driver is not reached. The signal for actuating the lamp comes from the ESP control unit via the CAN-interior.

Light sources

The high beam indicator lamp and the preglow indicator lamp are equipped with bulbs as the means of lighting.

All the other indicator and warning lamps in the instrument cluster are equipped with light emitting diodes (LED).

Apart from the actuations described above all the indicator and warning lamps are also actuated on the lamp test with the exception of the left turn signal indicator lamp, right turn signal indicator lamp and high beam indicator lamp are also actuated on the lamp test.

The actuation of some indicator and warning lamps, e.g. the CHECK ENGINE indicator lamp, is accompanied by the appearance of a fault message in the multifunction display. While some categories of message can be acknowledged and canceled, the warning and indicator lamps remain on for as long as the problem remains present. These indications cannot be canceled!

Indicator lamp test and engine running detection, function		GF54.30-P-2014GZ
"CHECK ENGINE" indicator lamp component description	Model 164 with engine 156.980	GF54.30-P-5011AMG
	Model 164.1 with engine 113.964	GF54.30-P-5011BK
	Model 164.1 with engine 272.967, Model 164.8 with engine 273.923/ 963	GF54.30-P-5011V