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Control/Warning Messages, Function - GF54.30-P-2001GW

Model 463 

as of Model year 2013 

Function requirements, general 

The electronic ignition lock control unit (N73) sends the status of circuit 15 as of production date April 3rd, 2018 (except Model 463.342) over the user interface CAN (CAN HMI) or up to production date April 2nd, 2018 or for Model 463.342 over suspension CAN 2 (CAN E2) to the instrument cluster (A1).

Control/warning messages, general 

The instrument cluster control/warning messages notify the driver about the current state of the systems installed in the vehicle.

The instrument cluster can issue indicator and warning messages in the following ways:

Visual control/warning messages:

The visual control/warning messages are output via the multifunction display (A1p13) or the indicator/warning lamps.

Audible control/warning messages:

The acoustic control/warning messages are output as of production date April 3rd, 2018 (except Model 463.342) through actuation of the instrument cluster speaker (H4/61) in the driver footwell or up to production date April 2nd, 2018 or for Model 463.342 through the warning buzzer (A1h1) and through the acoustic turn signal light function check (A1h2).

G13658746Courtesy of MERCEDES-BENZ USA

Shown on Model 463 as of production date April 3rd, 2018 (except Model 463.342 and except code J25 (Instrument cluster - DIGITAL FULL DISPLAY) 

G13658747Courtesy of MERCEDES-BENZ USA

Shown on Model 463 up to production date April 2nd, 2018 or Model 463.342 

IMPORTANT Model 463.342

as of Model year 2017

The speedometer display only goes up to 160 km/h.

The messages shown on the multifunction display are split up into four

categories according 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 shown within a maximum period of t = 2 s after a fault occurs, then automatically stored in the message memory and they cannot be acknowledged. When they occur, a brief warning tone is issued as of production date April 3rd, 2018 over the instrument cluster speaker or up to production date April 2nd, 2018 or on Model 463.432 over the warning buzzer.

Category 2 (messages with medium priority): 

Category 2 messages require the intervention of the driver and appear with a time delay of a maximum of t = 2 s. These messages also include operating feedback. Category 2 messages can be acknowledged. When they occur, a brief warning tone is issued as of production date April 3rd, 2018 over the instrument cluster speaker or up to production date April 2nd, 2018 or on Model 463.432 over the warning buzzer.

Category 3 and 4 (messages with low priority): 

These messages are menu displays and only serve as information for 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.

Function sequence for control/warning messages 

The instrument cluster informs the driver about the functionality and status of the installed vehicle systems. Safety-relevant system activities or system malfunctions are shown to the driver in the form of control and warning messages in the instrument cluster.

The following display options are provided for this purpose:

As of production date April 3rd, 2018 (except Model 463.342): 

The instrument cluster is connected to the vehicle electronics system via user interface CAN.

The electronic ignition lock control unit sends requests to output control and warning messages from control units that are connected to one of the following CANs via user interface CAN to the instrument cluster:

The powertrain control unit (N127) sends requests to output control and warning messages from control units that are connected to one of the following CANs via the chassis FlexRay to the electronic ignition lock control unit:

Up to 02 04 2018 or for Model 463 342: 

The instrument cluster is connected over suspension CAN 2 and the interior CAN (without code E11 (Stealth light with convoy marking)) or the instrument cluster CAN (CAN KI) (with code E11 (Stealth light with convoy marking)) to the on-board electronics.

Requests to display indicator and warning messages from control units connected to these CANs, are read-in by the instrument cluster over chassis CAN 2, the interior CAN (without code E11 (Stealth lights with convoy marking)) or over the interior CAN, stealth lights control unit (N1) and the instrument cluster CAN (with code E11 (Stealth lights with convoy marking)).

The electronic ignition lock control unit sends requests to issue control and warning messages from control units that are connected to the following CANs over chassis CAN 2 to the instrument cluster:

Engine 176:

Requests to issue control and warning messages from control units connected to the following CANs are sent by the powertrain control unit over suspension CAN 1 to the electronic ignition lock control unit:

IMPORTANT The systems and functions listed in the following tables can request control and warning messages over the corresponding control unit.

Special case of country-dependent seat belt reminder warning: 

If, immediately prior to starting a journey or during a journey, a seat belt is detected to be not fitted, the instrument cluster issues a country-specific optical and acoustic seat belt reminder warning.

The Supplemental Restraint System control unit (N2/10) sends information on the status of the driver and front passenger seat belts as of production date April 3rd, 2018 (except Model 463.342) over the user interface CAN or up to production date April 2nd, 2018 or for Model 463.342 over suspension CAN 1, electronic ignition lock control unit and suspension CAN 2 to the instrument cluster.

The instrument cluster evaluates this information for issuing a country-specific seat belt reminder warning.

IMPORTANT The seat belt reminder message for the front passenger is only issued, if the front passenger seat is recognized as occupied.

Corresponding information for seat occupancy recognition is sent by the Supplemental Restraint System control unit as of production date April 3rd, 2018 (except Model 463.342) over the user interface CAN or up to production date April 2nd, 2018 or for Model 463.342 over suspension CAN 1, electronic ignition lock control unit and suspension CAN 2 to the instrument cluster.

If a seat belt is not fastened, the Supplemental Restraint System control unit sends a corresponding signal as of production date April 3rd, 2018 (except Model 463.342) over the user interface CAN or up to production date April 2nd, 2018 or for Model 463.342 over suspension CAN 1, electronic ignition lock control unit and suspension CAN 2 to the instrument cluster.

The manner of how the seat belt reminder warning is issued differs in whether the seat belt reminder warning is prescribed by law or not and is incorporated into the assessment through the New Car Assessment Program (NCAP).

NCAP is an assessment program for safety in new vehicles.

In countries in which the seat belt reminder is prescribed by law (extended NCAP), the seat belt warning display is actuated for a period of t = 6 ± 2 s. It is irrelevant here whether the driver seat belt is fitted or not. If the driver seat belt is not fastened, the instrument cluster as of production date April 3rd, 2018 also issues a warning tone over the instrument cluster speaker or up to production date April 2nd, 2018 or on Model 463.432 over the warning buzzer.

IMPORTANT If the driver seat belt is fastened during this time interval, the acoustic warning stops sounding.

An assessment of whether the front passenger seat belt is fitted or not given during this time interval. Only after the time interval of t = 6 s has expired, does the assessment of both seat belts occur. In countries in which the seat belt warning is not prescribed by law, the seat belt warning lamp is only actuated during the indicator lamp test.

As soon as engine start is detected ("Engine running" signal or "Drive train ready" set), information on the status of seat belts for driver and front passenger is evaluated. If a seat belt is defined to not be fitted, the instrument cluster actuates the seat belt warning lamp. When the vehicle starts to move, several acoustic warning phases are run through once a speed of v ≥ 25 km/h is reached.

Three or four acoustic warnings are issued in accordance with the seat belt reminder warning. While these acoustic warnings are being issued, the seat belt warning lamp flashes on and off at a frequency of f = 2 Hz. After all the acoustic warning phases have expired the seat belt warning lamp is permanently actuated.

Acoustic warning phase 1:

If the vehicle drives off, acoustic warning phase 1 starts to run in the background. When a speed of v ≥ 25 km/h is reached, a quiet warning tone is issued at an interval of t = 4 s. Acoustic warning phase 1 lasts for a max of t = 20 s. Acoustic warning phase 2 then begins.

Acoustic warning phase 2:

After expiry of acoustic warning phase 1 and from a speed of v ≥ 25 km/h, a quiet acoustic warning is issued for a maximum of t = 20 s at an interval of t = 2 s.

Acoustic warning phase 3 then begins.

Acoustic warning phase 3:

After expiry of acoustic warning phase 2 and from a speed of v ≥ 25 km/h a quiet acoustic warning is issued for a maximum of t = 20 s at an interval of t = 1 s.

Acoustic warning phase 4 then begins.

Acoustic warning phase 4 (Euro NCAP only):

After expiry of acoustic warning phase 3 and from a speed of v ≥ 25 km/h a loud acoustic warning is issued for a maximum of t = 93 s at an interval of t = 0.5 s.

Cancellation of seat belt reminder warning:

Seat belt reminder warning reactivation:

  Electrical function schematic of instrument cluster, control/warning message Model 463 (except 463.342) as of Model year 2019 PE54.30-P-2054-97ZGB
    Model 463 (except 463.342) as of Model year 2013 up to Model year 2019
Model 463.342 as of Model year 2017		 PE54.30-P-2054-97ZGA
  Overview of system components, instrument cluster (IC) component description   GF54.30-P-9996GW 
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