Instrument Cluster Control, Basic Function - GF54.30-P-1001A

Model All (4xWD) 

Model All (CAR) 

Overview 

This document contains information on:

• General 
• Function requirements 
• Function 
  • Instrument cluster control 
  • Message management 
  • Service interval processor 
  • Trip computer 
  • Driving style analysis 
  • Display control 

The seat belt warning is described in a separate document.

General 

The instrument cluster control actuates all the displays in the instrument cluster display. The instrument cluster displays all drive-relevant information, e.g. fuel supply, engine speed and coolant temperature. Furthermore, the driver is shown actions, recommendations and malfunctions of the systems installed in vehicle.

Function requirements 

• Terminal 15 R on

Function 

Instrument cluster control 

For display control in the instrument cluster, the instrument cluster control system communicates with the respective systems over the vehicle's network architecture. The instrument cluster control system evaluates the incoming data and converts the information in the data for display on the instrument cluster. The image data is transfered via the high speed video link (HSVL) interface to the instrument cluster.

The instrument cluster control system also processes the following information:

• Terminal status of terminal 15
• Fuel supply
• Engine speed
• Coolant temperature
• Outside temperature
• Requests to display system information
• Requests to output warnings
• Information on the on-board electrical system utilization

Message management 

The instrument cluster control system divides all incoming requests for displaying messages into four categories appropriate to their level of urgency.

• Category 1 (messages with highest priority):

  Category 1 messages refer to states and situations which impair safety, and they take priority over messages with lower priority. These messages are displayed within max. 2 s after they occur, stored automatically in the message memory and cannot be acknowledged. When they occur, a brief warning tone is sounded.

• Category 2 (messages with medium priority):

  Category 2 messages require the intervention of the driver and appear after a delay of max. 2 s. These messages also include operating feedback. Category 2 messages can be acknowledged. When they occur, a brief warning tone is sounded.

• Category 3 and 4 (messages with low priority):

  These messages are shown in the menu and they are only for providing information to the driver (e.g. low washer fluid level). No warning chime is emitted.

  Messages with low priority are overlaid by messages with high priority. If several messages with the same priority occur, the message currently displayed is overlaid by the new message after the minimum display time has elapsed.

Service interval processor 

The service interval processor is integrated into the instrument cluster control system. It determines the respective service due dates based on the vehicle's usage conditions. The instrument cluster shows either the remaining time or the remaining distance to the service due date. The driver or service personnel are also provided with an overview of the service work that needs to be carried out on the vehicle. The service interval processor takes into account the time and distance-dependent additional operations.

Trip computer 

The trip computer is integrated into the instrument cluster control system. It analyzes the handling characteristics and shows the driver among other things the following information:

• Travel distance
• Driving time
• Average speed
• Average fuel consumption
• Present consumption

Trip computer information can be shown in the following display screens:

• After start (short-distance memory)
• After reset (long-distance memory)

Driving style analysis 

The driving style analysis is integrated into the instrument cluster control system. It evaluates the after start handling characteristics up to the end of the journey and, with the ECO display, it supports a driving style that provides for optimum fuel consumption.

The individual handling characteristics are displayed graphically on the ECO display. The following information is displayed:

• Acceleration characteristic
• Uniformity of driving style
• Deceleration and coasting characteristics

Display control 

Depending on the model involved, the instrument cluster and the central display may be combined in one display cluster. Depending on the vehicle equipment, a differentiation is made between the following display control variants:

• Vehicles with Connect 5 multimedia system

  The head unit/instrument cluster control unit actuates all the displays, both in the instrument cluster and the central display as well as all multimedia functions such as, e.g. radio, telephone and the media mode.

• Vehicles with Connect 20 multimedia system

  The instrument cluster control unit actuates all the displays in the instrument cluster.

  The head unit actuates the displays in the central display and all multimedia functions such as e.g. radio, telephone and the media mode.

  • Vehicles with 3D combination display:

    On vehicles with 3D combination display, the driver's eye position is determined by the driver camera. With this information, the instrument cluster control unit calculates a left and right view, which is then superimposed on the display so that a 3D impression is generated. If the driver is not recognized, e.g. due to concealment, the 3D model display switches smoothly to a 2D display model. The 3D function can be activated or deactivated in the head unit menu.

	Function schematics
	Function schematic for displaying operating statuses in instrument cluster display	Model 118, 167, 177, 243, 247, 293 Model 213, 238, 257, 290 as of model year 2021	PE54.30-P-2503-97A
		Model 206, 214, 223, 236, 254	PE54.30-P-2503-97B
		Model 192, 232	PE54.30-P-2503-97C
		Model 294, 295, 296, 297	PE54.30-P-2503-97D
		Model 464	PE54.30-P-2503-97E
	Function schematic for displaying trip information in instrument cluster display	Model 118, 167, 177, 243, 247, 293 Model 213, 238, 257, 290 as of model year 2021	PE54.30-P-2504-97A
		Model 206, 214, 223, 236, 254	PE54.30-P-2504-97B
		Model 192, 232	PE54.30-P-2504-97C
		Model 294, 295, 296, 297	PE54.30-P-2504-97D
		Model 464	PE54.30-P-2504-97E
	Function schematic of instrument cluster picture display	Model all (CAR) with code 451 (3D combination display)	PE54.30-P-2506-97A
	Additional basic functions
	Head unit/instrument cluster displays, basic function	Model all (CAR)	GF54.30-P-2005A
	Instrument cluster control unit, basic function	Model all (4xWD) with Connect 20 Model all (CAR) with Connect 20	GF54.30-P-9891A
	Head unit/instrument cluster control unit, basic function	Model all (CAR) with code 545 (Connect 5 (NTG6))	GF82.85-P-9893A
	Workshop mode, basic function	Model all (CAR)	GF82.90-P-9902A
	Seat belt warning, basic function		GF91.60-P-1001A