Displaying mileage, function - GF54.30-P-3022R

MODEL 230

Networking

Fig 1: Displaying Mileage - Signal Communication

Courtesy of MERCEDES-BENZ USA

Calculation of mileage

The mileage is calculated in the instrument cluster (A1) using the vehicle speed (integration according to time).

Estimation of mileage
To estimate the mileage and the vehicle speed, the processor in the instrument cluster (A1) evaluates the wheel speed signals from the
- Left front wheel speed sensor (L6/1)
- Right front wheel speed sensor (L6/2)
- Left rear wheel speed sensor (L6/3)
- Right rear wheel speed sensor (L6/4)
The instrument cluster (A1) receives the wheel speeds in RPM over the engine compartment CAN from the SBC control module (A7/3n1) via the ESP, SPS and BAS control module (N47-5).
The tire size is taken into account when calculating the mileage and the vehicle speed. The tire size is encoded using the STAR Diagnosis tool.

Refer to the document entitled "Displaying speed, function" for evaluation of the wheel speed signals.

Displaying the total mileage

The total mileage is displayed as a 6-figure number on the main screen of the left multifunction display (A1p13) in kilometers or miles as soon as the instrument cluster (A1) is activated.
The range for the total mileage odometer is from 0 to 999999 kilometers or miles.

If the maximum mileage is reached, the counter is not reset to 0. In this case the instrument cluster (A1) must be replaced.

Displaying the trip mileage

The trip mileage is displayed as a 5-figure number on the main screen of the left multifunction display (A1p13) in kilometers or miles as soon as the instrument cluster (A1) is activated.
The range for the trip mileage odometer is from 0 to 9999.9 kilometers or miles. When the maximum mileage is reached, the display is reset to 0.

Resetting the trip odometer

The trip odometer is reset to 0 by pressing the instrument illumination dimmer and reset button (A1r1).

Requirements:

The instrument cluster (A1) is activated and
The left multifunction display (A1p13) is showing the main screen (total and trip mileage).

Kilometers/miles switchover

The mileage display can be switched over from kilometers to miles by means of the Settings function.

If implausible CAN messages are received for all wheel speed signals, the total and trip mileage displays are "frozen" and an error bit is set.

The current reading on the total mileage odometer is also relayed onto the interior compartment CAN by the instrument cluster (A1).

Storage of data

The total mileage remains stored for at least 10 years when the battery is disconnected.

The trip mileage is also protected against data loss if the battery is removed for a short period of time.

	Activating instrument cluster, function		GF54.30-P-2006R
	Displaying speed, function		GF54.30-P-3025R
	Instrument cluster (IC), operating instructions		GF54.30-P-0002-05R
	Instrument cluster (IC), location / task		GF54.30-P-3039R
	ESP control module, location / task / function		GF42.45-P-4500SL