Average speed, function - GF54.50-P-2009GZ

MODEL 164 up to Model Year 2008 

Average speed "Since start" (short-distance memory), function 

Average speed since start.

Fig 1: Display - Average Speed Screen (Since Start)

Courtesy of MERCEDES-BENZ USA

Average speed "since reset" (long-distance memory), function 

Average speed since last reset.

Fig 2: Display - Average Speed Screen (Since Reset)

Courtesy of MERCEDES-BENZ USA

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

The following information is required: 

• Travel time: This is calculated internally in the instrument cluster (A1).
• Travel distance: This is determined from the four wheel speeds. The wheel speeds are sent as engine compartment CAN messages from the ESP control unit (N47-5) to the instrument cluster.

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).