Displaying vehicle speed ranges with segment speedometer, function - GF54.30-P-3026S
Models 215, 220
Segment speedometer
The electronic speedometer (A1p8) can display brighter segments on the outer scale.
This feature is used in the "winter tires speed limit", the "variable speed limit" and the "Distronic" functions.
Segment speedometer-speed limit for winter tires
If the winter tires speed limit is switched on, the first 21 segments are displayed (from 0 to 210 km/h). This clearly indicates the active vehicle speed range.
Segment speedometer with variable speed limit and Distronic valid up to 31.8.02
The "variable speed limit" and "Distronic" systems make use of the segment speedometer in the following way:
If the adjusted speed is in a scale segment, the associated scale segment is displayed brighter. If it is between two scale segments, the two adjacent scale segments are displayed brighter.
Examples:
The adjusted speed is 85 km/h (value is in one segment), then:
- The 0 -80 km/h segments are→ DARK
- The 80 -90 km/h segment is→ BRIGHT
- The 90 -260 km/h segments are→ DARK
The adjusted speed is 89 - 91 km/h (value is between two segments), then:
- The 0 -80 km/h segments are> DARK
- The 80 -100 km/h segments are> BRIGHT
- Die 100 -260 km/h segments are> DARK
If the speedometer needle leaves the lit range, other scale segments are lit according to the movement of the needle. This clearly alerts the driver to variations from the set speed.
Segment speedometer with variable speed limit and Distronic valid as of 01.9.02
The function of these systems is shown to the driver via 2 separate displays. The permanent display with an activated function takes place via the segments in the speedometer. With this display it is possible to darken individual partial areas of the speedometer scale. Supplemental information is displayed to the driver on the multifunction display for a limited periodA1p13).
This display takes place when the driver intervenes such as speed changes or activation attempts. If a condition occurs in which a driver should intervene a warning appears on the display
Segment speedometer with variable speed limit
With the variable speed limit all segments of the useable vehicle speed range are actuated bright and the remaining segments are actuated dark. With an adjusted variable speed limit which is not a multiple of 10 km/h or 5 mph, rounding up takes place to the next highest multiple of 10 km/h or 5 mph.
Example 1 :
The adjusted speed is 87 km/h (value is in one segment), then:
- The 0 -90 km/h segments are→ BRIGHT
- The 90 -260 km/h segments are→ DARK
Example 2:
The adjusted speed is 70 km/h (value is in one segment), then:
- The 0 -70 km/h segments are→ BRIGHT
- The 70 -260 km/h segments are→ DARK
If the speedometer segments flash, this means that the variable speed limit can no longer brake the vehicle (driving downhill). The bright phase is t =600 ms, the dark phase is t = 400 ms.
Segment speedometer with Distronic
With the cruise control display the segment, in which the adjusted speed is located, is switched bright. If the speed of the vehicle deviates from the adjusted speed, the segments up to the target speed are switched bright.
Example 1:
With an adjusted speed of 80 km/h (value is in one segment), then:
- The 60 -70 km/h segment → actuated bright
Example 2: (for +/- 1km/h)
With an adjusted speed of, for example, 81 km/h and a target speed of 55 km/h:
- The 50 -90 km/h segment is→ actuated bright
CAN data for segment speedometer
The instrument cluster receives the data for the "speed limit for winter tires" and "variable speed limit" from the traction systems control module via the engine compartment CAN (A1)(N47).
The instrument cluster receives the data for "Distronic" (A1) from the DTR control module via the engine compartment CAN (N63/1).
| Instrument cluster (IC), location/task | GF54.30-P-3039S |