GF54.50-P-2007GZ Fuel Consumption, Function

GF54.50-P-2007GZ Fuel Consumption, Function
- up to model year 08






Fuel consumption "since start" (short-distance memory), function
Average gasoline consumption since start.







Fuel consumption "Since reset" (long-distance memory), function
Average gasoline consumption since last reset.

The display screen "as of start" or " as of reset" for the travel time can be activated via the system selection button (S110s3) and scroll forward/back button (S110s1) of the multifunction steering wheel.

Depending on the unit setting (miles/kilometers) and the national variant coding of the instrument cluster (A1) the fuel consumption is displayed in:
^ Miles per gallon
^ Liters per 100 kilometers or
^ Kilometers per liter (only if national variant Japan is coded)

The trip computer calculates the average fuel consumption figures from the mileage traveled and the fuel consumption signal.

The fuel consumption signal uses information on the amount of fuel injected within a specific period.

The instrument cluster receives this data in the following way:
^ The fuel consumption signal is generated by the ME control unit (N3/10) and sent as a message on the engine compartment CAN.
^ The mileage traveled is calculated from the four wheel speeds. The signals are sent from the ESP control unit (N47-5) over the engine compartment CAN.

Following a reset it may take up to three kilometers/miles or two minutes before sufficient data is available in order to correctly calculate and display the consumptions. Depending on the unit setting (kilometers/miles) and the national variant coding of the instrument cluster the fuel consumption is displayed in:
^ litters per 100 kilometers (ECE)
^ miles per gallon (USA)
^ kilometers per litter (Japan)

It is quite normal for the "Since Start" display (short-distance memory) and "Since Reset" display (long-distance memory) to show different values, since the two displays are based on different sets of data.

The "since start" display (short-distance memory) reacts much more sensitively to the current driving situation than the "since reset" display (long-distance memory).