Control/Warning Messages, Function - GF54.30-P-2001FG
Model 213 up to model year 2021
Function requirements, general
- Terminal 15R On:
The electronic ignition lock control unit (N73) transmits the status of circuit 15 via the user interface CAN (CAN HMI) to the instrument cluster (A1).
Control/warning messages, general
The instrument cluster outputs control and warning messages to inform the driver about operation and the status of the systems installed in the vehicle.
These messages can be output visually in the instrument cluster and acoustically through actuation of the instrument cluster speaker (H4/61) in the driver footwell.
Text messages or pictograms can be shown in the instrument cluster. Control messages are shown in green, yellow, red or blue. Warning messages are shown in red.
Shown on model 213 except code 464 (Full display digital instrument cluster)
Model 213
up to model year 2021
with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))
Model 213
up to model year 2021
with code ME06 (Hybrid drive 60 kW variant (incl. plugin))
The power display (A1p19) is not shown here.
Model 213
up to model year 2021
with code 464 (Instrument cluster 12.3" diagonal)
The symbols available on the analog display as indicator and warning lamps are shown accordingly on the digital full display.
Function sequence for control/warning messages
The messages output in the instrument cluster 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 displayed within max. 2 s after they occur, stored automatically in the message memory and cannot be acknowledged. When they occur, a brief acoustic warning is emitted over the instrument cluster speaker.
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 acoustic warning is emitted over the instrument cluster speaker.
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.
Operating feedback that requires little text is shown for 5 s as a one-line text field in the instrument cluster and then hidden again. 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:
- Interior CAN (CAN B)
- Diagnostic CAN (CAN D)
- Periphery CAN (CAN PER)
- Suspension FlexRay (Flex E)
The drivetrain 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:
- Engine CAN (CAN C)
- Drive train CAN (CAN C1)
- Drive train sensor CAN (CAN I)
- Hybrid CAN (CAN L) (for hybrid vehicles)
The systems and functions listed in the table below can request the output of control and warning messages via the corresponding control unit.
| System/Function | Control unit | Connection | Output | ||
|---|---|---|---|---|---|
| Control/warning message | Text message | Acoustic | |||
| Exhaust aftertreatment | AdBlue® control unit (N118/5) (engine 642 with code U77 (BlueTEC (SCR) diesel exhaust gas cleaning), engine 654 with code U79 (BlueTEC (SCR) diesel exhaust gas cleaning, generation 3)) | CAN I/CAN C/Flex E/CAN HMI | - | x | - |
| Distance Pilot DISTRONIC (with code 239 (DISTRONIC PLUS) or code 23P (Driving Assistance Package)) | DISTRONIC distance pilot controller unit (A108/1) Mercedes-Benz Intelligent Drive control unit (N62/4) | Flex E/CAN HMI | DISTRONIC warning lamp (A1e59) | x | |
| ADAPTIVE BRAKE | Electronic Stability Program control unit (N30/4) | Flex E/CAN HMI | Anti-lock braking system indicator lamp (A1e17), Electronic Stability Program warning lamp (A1e41), brake system warning lamp (A1e51), brake force distribution warning lamp (A1e75) | x | |
| Adaptive Highbeam Assist (with code P35 (Light Package)) | Front SAM control unit (N10/6) | CAN B/CAN HMI | High beam indicator lamp (A1e3) | x | - |
| AIR BODY CONTROL (with code 489 (AIR BODY CONTROL)) | AIR BODY CONTROL control unit (N51/3) AIR BODY CONTROL Plus control unit (N51/8) | Flex E/CAN HMI | - | x | - |
| Active Brake Assist (with code 258 (COLLISION PREVENTION ASSIST)) | Active Brake Assist controller unit (A108) | CAN PER/CAN HMI | - | x | x |
| Active Brake Assist with intersection function (with code 23P (Driving assistance package)) | Mercedes-Benz Intelligent Drive control unit (N62/4) | Flex E/CAN HMI | - | - | x |
| Active Blind Spot Assist (with CODE 23P (Driving assistance package)) | Mercedes-Benz Intelligent Drive control unit (N62/4) | Flex E/CAN HMI | - | x | x |
| Active Lane Keeping Assist (with CODE 23P (Driving assistance package)) | Stereo multifunction camera (A40/13) | Flex E/CAN HMI | - | x | |
| Active Lane Keeping Assist (with code 243 (Active Lane Keeping Assist)) | Mono multifunction camera (A40/11) | CAN PER/CAN HMI | - | x | x |
| Trailer recognition (with CODE 550 (Trailer hitch)) | Trailer recognition control unit (N28/1) | CAN B/CAN HMI | Trailer monitor lamp (A1e77) | x | - |
| Attention assistance system | Electronic Stability Program control unit (N30/4) | Flex E/CAN HMI | - | x | x |
| Audio/Navigation/Communication | Head unit (A26/17) | HMI CAN | - | x | - |
| Exterior lights (ABL) | Front SAM control unit (N10/6) or rear SAM control unit (N10/8) | CAN B/CAN HMI | Low beam indicator lamp (A1e67), high beam indicator lamp (A1e3), rear fog light indicator lamp (A1e18) (except code 460 (Canada version) and except code 494 (USA version)), standing light indicator lamp (A1e38) | x | x |
| Left headlamp control unit (E1 n9) or right headlamp control unit (En9) (with code 631 (Static left-hand traffic LED headlamp) or code 632 (Static right-hand traffic LED headlamp) or code P35 (Light Package)) | CAN PER/CAN HMI | - | x | - | |
| Automatic transmission control (transmission 725) | Fully integrated transmission control unit (Y3/8n4) | CAN C1/Flex E/CAN HMI | - | x | - |
| Turn signal confirmation | Front SAM control unit (N10/6) | CAN B/CAN HMI | Left turn signal lights indicator lamp (A1e1), Right turn signal indicator lamp (A1e2) | - | x |
| Brake fluid level | Front SAM control unit (N10/6) | CAN B/CAN HMI | Brake system warning lamp (A1e51) | x | - |
| Brakepad wear display | Front SAM control unit (N10/6) | CAN B/CAN HMI | - | x | - |
| Energy management | Front SAM control unit (N10/6) | CAN B/CAN HMI | - | x | - |
| Electrical power steering | Electrical power steering control unit (N68) | Flex E/CAN HMI | Power steering warning lamp (A1e70) | x | - |
| Electronic Stability Program (ESP®) | Electronic Stability Program control unit (N30/4) | Flex E/CAN HMI | ESP®/ASR OFF warning lamp (A1e32) (status ESP® ON/OFF) Electronic Stability Program warning lamp (A1e41) (ESP® system active) | x | - |
| Suspension (as of 01.06.2017, with code 459 (Steel suspension with adjustable damping) or code 489 (AIR BODY CONTROL)) | AIR BODY CONTROL control unit (N51/3) AIR BODY CONTROL Plus control unit (N51/8) | Flex E/CAN HMI | Suspension fault indicator lamp (A1e55) | - | - |
| Windshield washer system fluid level | Front SAM control unit (N10/6) | CAN B/CAN HMI | - | x | - |
| Speed warning (Gulf States national version) | Instrument cluster (A1) | Internal | - | x | x |
| Seat belt reminder warning | Supplemental Restraint System control unit (N2/10) | HMI CAN | Seat belt warning lamp (A1e9) | - | x |
| Rear SAM control unit (N10/8) | CAN B/CAN HMI | - | x | x | |
| High-voltage on-board electrical system HYBRID (for HYBRID vehicles) | Power electronics control unit (N129/1), battery management system control unit (N82/2) | CAN L/Flex E/CAN HMI | - | x | - |
| KEYLESS-GO | KEYLESS-GO control unit (N69/5) | CAN B/CAN HMI | - | x | - |
| Climate control | Climate control control unit (N22/1) | CAN B/CAN HMI | - | x | x |
| Fuel system | Fuel system control unit (N118) | CAN C1/Flex E/CAN HMI | Fuel display (A1 p2) | x | - |
| Coolant level | Front SAM control unit (N10/6) | CAN B/CAN HMI | - | x | - |
| Coolant temperature | CDI control unit (N3/9) (diesel engine) or ME-SFI [ME] control unit (N3/10) (gasoline engine) | CAN C/Flex E/CAN HMI | Coolant temperature display (A1p1) | x | - |
| Lights on warning | Front SAM control unit (N10/6) | CAN B/CAN HMI | - | x | x |
| Memory adjustment (with code 275 (Memory package)) | Driver's seat control unit (N32/1), front passenger seat control unit (N32/2) | CAN B/CAN HMI | - | - | x |
| Engine management | CDI control unit (N3/9) (diesel engine) or ME-SFI [ME] control unit (N3/10) (gasoline engine) | CAN C/Flex E/CAN HMI | Engine diagnosis indicator lamp (A1e58) | x | - |
| Engine oil level warning | CDI control unit (N3/9) (diesel engine) or ME-SFI [ME] control unit (N3/10) (gasoline engine) | CAN C/Flex E/CAN HMI | - | x | - |
| Emergency call system (with code 360 (HERMES UMTS) or code 362 (HERMES LTE)) | HERMES control unit (N112/9) | CAN D/CAN HMI | - | x | - |
| Parking system (with code 235 (Parking Pilot with PARKTRONIC) or code P44 (Parking Package)) | Parking system control unit (N62) | Flex E/CAN HMI | - | x | x |
| PRE-SAFE® | Left front reversible emergency tensioning retractor (A76) or right front reversible emergency tensioning retractor (A76/1) | HMI CAN | Supplemental restraint system indicator lamp (A1e15) | x | - |
| Tire pressure monitoring system (with code 475 (Tire pressure monitoring system)) | Tire pressure monitor control unit (N88) | HMI CAN | Tire pressure monitor warning lamp (A1e66) | x | - |
| Tire pressure loss warning (with code 477 (Tire pressure loss warning)) | Electronic Stability Program control unit (N30/4) | Flex E/CAN HMI | - | x | - |
| Manual transmission (transmission 716) | Powertrain control unit (N127) | Flex E/CAN HMI | - | x | - |
| Stationary heater (with CODE 228 (Stationary heater)) | Stationary heater control unit (A6n1) | LIN B8-2/CAN B/CAN HMI | - | x | - |
| Supplemental restraint system | Supplemental Restraint System control unit (N2/10) | HMI CAN | Supplemental restraint system indicator lamp (A1 e15) | x | - |
| Fuel cap warning (with code 494 (USA version)) | CDI control unit (N3/9) (diesel engine) or ME-SFI [ME] control unit (N3/10) (gasoline engine) | CAN C/Flex E/CAN HMI | Fuel reserve warning light (A1e4) | x | - |
| TEMPOMAT (except code 23P (Driving Assistance Package) and except code P20 (Driving Assistance Plus Package)) | Electronic Stability Program control unit (N30/4) | Flex E/CAN HMI | Speedometer (A1 p8) | x | x |
| TEMPOMAT (with code 23P (Driving Assistance Package) or code P20 (Driving Assistance Plus Package)) | Mercedes-Benz Intelligent Drive control unit (N62/4) | Flex E/CAN HMI | Speedometer (A1p8) | x | x |
| Blind Spot Assist (with CODE 22P (Lane package)) | Integrated outer right rear bumper radar sensor (B92/6) | CAN PER/CAN HMI | - | x | x |
| Doors OPEN warning | Front SAM control unit (N10/6), rear SAM control unit (N10/8), left front door control unit (N69/1), right front door control unit (N69/2), left rear door control unit (N69/3), right rear door control unit (N69/4) | CAN B/CAN HMI | - | x | x |
| Traffic Sign Assist (with CODE 513 (Traffic Sign Assist)) | Mono multifunction camera (A40/11), Stereo multifunction camera (A40/13) | CAN PER/CAN HMI Flex E/CAN HMI | - | x | - |
| Preglow indicator (diesel engine) | CDI control unit (N3/9) | CAN C/Flex E/CAN HMI | Preglow indicator lamp (A1e16 | - | - |
Special case of country-dependent seat belt reminder warning:
If a seat belt is detected as not being worn directly before starting a journey or whilst traveling, then, depending on the country, the instrument cluster will issue an optical warning and warning tones (seat belt warning).
The Supplemental Restraint System control unit (N2/10) sends information on the status of the driver and front passenger seat belts to the instrument cluster via user interface CAN.
The rear SAM control unit (N10/8) transmits information on the status of the rear seat belts via interior CAN, electronic ignition lock control unit and user interface CAN to the instrument cluster.
The instrument cluster evaluates this information for issuing a seat belt reminder warning.
The seat belt reminder message for the front passenger is only issued if the front passenger seat is occupied. The Supplemental Restraint System control unit sends information on the assignment of front passenger seat to the instrument cluster via user interface CAN. The rear seat belt reminder warning is always output as of 6 km/h. After 5 s or after acknowledgment, the rear seat belt reminder warning disappears. The output of the rear seat belt warning does not have any effect on the deployment of the restraint equipment; it only serves as information for the driver.
The way in which the seat belt reminder warning is output depends on whether the seat belt reminder warning is legally required or not and contributes to the assessment by the New Car Assessment Program (NCAP).
NCAP is a program for assessing the safety of new vehicles.
- Countries with legally prescribed seat belt reminder: Extended NCAP: USA and Canada.
- Countries without seat belt reminder warning prescribed by law: European New Car Assessment Program (Euro NCAP): Europe, China, Australia, Japan, Arab States of the Gulf and Korea.
In countries in which the seat belt reminder warning is prescribed by law (extended NCAP), the seat belt warning lamp is actuated for a period of 6 ± 2 s. It is irrelevant here whether the driver seat belt is fitted or not. If the driver's seat belt is not fastened, the instrument cluster also outputs an acoustic warning over the instrument cluster speaker.
If the driver seat belt is fastened in the meantime, the acoustic warning is muted.
There is no assessment here of whether the front passenger seat belt is fitted or not. The status of both seat belts is evaluated only after 6 s have expired. 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 recognized as not being fitted, the seat belt warning lamp lights up. If the vehicle then starts to move off, several acoustic warning phases are run through when a speed of 25 km/h is reached.
Depending on the type of seat belt warning issued, three or four acoustic warning phases are issued in succession. While they are being issued, the seat belt warning lamp flashes on and off at a frequency of 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 25 km/h is reached, a quiet warning tone is issued at an interval of 4 s. Acoustic warning phase 1 lasts for max. 20 s. Warning tone phase 2 is then started.
Warning tone phase 2:
After expiry of acoustic warning phase 1 and as of a speed of 25 km/h, a quiet acoustic warning is issued for max. 20 s at an interval of 2 s. Warning tone phase 3 is then started.
Warning tone phase 3:
After expiry of acoustic warning phase 2 and as of a speed of 25 km/h, a quiet acoustic warning is issued for max. 20 s at an interval of 1 s. Warning tone phase 4 is then started.
Acoustic warning phase 4 (Euro NCAP only):
After expiry of acoustic warning phase 3 and as of a speed of 25 km/h, a loud acoustic warning is issued for max. 93 s at an interval of 0.5 s.
Cancellation of seat belt reminder warning:
- The last acoustic warning phase is fully completed.
- The seat belt was fitted during the active seat belt reminder warning.
- When the vehicle is stationary the vehicle door on the actuating side is opened.
Seat belt reminder warning reactivation:
- Seat belt release has been detected again.
- If the vehicle is at a standstill and the driver or front passenger door is opened and then closed again.
- A new ignition cycle ("Engine running" or "Drive train operational" signal set).
| Electrical function schematic of instrument cluster, control/warning message | PE54.30-P-2054-97DBA | ||
| Overview of system components, instrument cluster (IC) component description | GF54.30-P-9996FG |