Control/warning messages, function - GF54.30-P-2001CAM
MODEL 207.3/4 as of model year 2014
Function requirements, general
- Circuit 15R ON
The electronic ignition lock control unit (N73) transmits the circuit status of circuit 15 via interior CAN (CAN B) 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:
- Optical issue of indicator and warning messages
- Acoustic output of indicator and warning messages
Visual control/warning messages:
The visual indicator and warning messages are displayed using the following instrument cluster components:
- Multifunction display (A1p13)
- Indicator/warning lamps
Audible control/warning messages:
The acoustic indicator and warning messages are issued using the following instrument cluster components:
- Warning buzzer (A1h1)
- Turn signal ticking via function check for turn signal lights, acoustic (A1h2)
The following components integrated in the instrument cluster are not shown:
- Warning buzzer
- Turn signal light function check, acoustic
The messages shown on the multifunction display are split up according to their level of urgency into four categories:
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 and automatically archived in the message memory within a maximum of t = 2 s after they occur, and cannot be acknowledged. When they occur, a brief warning is emitted by the buzzer.
Category 2 (messages with medium priority)
Messages in category 2 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 is emitted by the 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 cross-faded by the new message after expiry of the minimum display time.
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 and 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:
- Visual:
- Indicator lamps (green, yellow or blue)
- Warning lamps (red)
- Multifunction display
- Acoustic:
- Warning buzzer
- Turn signal light function check, acoustic
The instrument cluster is connected to the vehicle electronics system via the interior CAN and chassis CAN 2 (CAN E2).
Requests to issue control and warning messages from control units that are connected to this CAN, are read in by the instrument cluster via the interior CAN or chassis CAN 2.
Requests to issue control and warning messages from control units that are connected to the diagnostic CAN (CAN D) or chassis CAN 1 (CAN E1), are sent by the front SAM control unit with fuse and relay module (N10/1) via chassis CAN 2 to the instrument cluster. Requests to issue control and warning messages from control units that are connected to the chassis FlexRay (Flex E) are sent by the chassis gateway control unit (N93/7) (with CODE 23P (Driving assistance package PLUS)) via chassis CAN 2 to the instrument cluster.
Requests to issue control and warning messages from control units which are connected to the drive train CAN (CAN C) are sent by the CDI control unit (N3/9) (with diesel engine) or the ME-SFI control unit (N3/10) (with gasoline engine) via chassis CAN 1, the front SAM control unit and chassis CAN 2 to the instrument cluster.
The following systems and functions listed in the table can request the output of control and warning messages via the corresponding control unit.
| System/Function | Control unit | Connection | Output | ||
|---|---|---|---|---|---|
| Indicator lamp | Display | Acoustic | |||
| ADAPTIVE BRAKE | Electronic Stability Program control unit (N30/4) | CAN E1/CAN E2 | Antilock braking system indicator lamp (A1e17), Electronic Stability Program warning lamp (A1e41), Brake system warning lamp (A1e51) | X | - |
| Adaptive Highbeam Assist (with CODE 608 (Adaptive Highbeam Assist) or CODE 628 (AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+))) | Multifunction camera (A40/11) (without CODE 23P (Driving assistance package PLUS)) Stereo multifunction camera (A40/13) (with CODE 23P (Driving assistance package PLUS)) |
CAN E2 Flex E/CAN E2 | - | X | - |
| Active Lane Keeping Assist (with CODE 238 (Active Lane Keeping Assist)) | Stereo multifunction camera (A40/13) | Flex E/CAN E2 | - | X | - |
| Trailer recognition (with CODE 550 (Trailer hitch)) | Trailer recognition control unit (N28/1) | CAN B | - | X | - |
| Audio/Navigation/Communication | Radio (A2) (with CODE 523 (MB Audio 20 radio) or CODE 510 (Audio 20 with CD changer) or CODE 505 (20 NTG5 radio without navigation capability) or CODE 522 (Audio 20 radio)) or COMAND controller unit (A40/3) (with CODE 512 (COMAND APS incl. DVD changer) or CODE 527 (COMAND APS with single DVD drive (with navigation)) or code 528 (COMAND incl. DVD changer) or CODE 531 (COMAND APS)) | CAN B | - | X | - |
| Attention assistance system | Electronic Stability Program control unit (N30/4) | CAN E1/CAN E2 | - | X | X |
| Exterior lights (ABL) | Front SAM control unit with fuse and relay module (N10/1) | CAN B | High beams indicator lamp (A1e3), Rear fog light indicator lamp (A1e18) (without CODE 460 (Canada version) and without CODE 494 (USA version)), Standing lights indicator lamp (A1e38), Low beam indicator lamp (A1e67) |
X | X |
| Left headlamp control unit (E1n9) or right headlamp control unit (E2n9) | CAN E2 | - | X | - | |
| Automatic transmission control | Intelligent servo module for DIRECT SELECT (A80) (with transmission 722.9), Fully integrated transmission control unit (Y3/8n4) (with transmission 722.9, 725) |
CAN C/CAN E1/CAN E2 | - | X | - |
| Turn signal confirmation | Front SAM control unit with fuse and relay module (N10/1) | CAN B | Left turn signal lights indicator lamp (A1e1), Right turn signal indicator lamp (A1e2) |
- | X |
| Brake fluid level | Front SAM control unit with fuse and relay module (N10/1) | CAN B | Brake fluid and parking brake indicator lamp (A1e6) | X | - |
| Brake wear indicator | Front SAM control unit with fuse and relay module (N10/1) | CAN B | - | X | - |
| COLLISION PREVENTION ASSIST (up to 28.11.2014 with CODE 258 (Collision Prevention Assist), as of 01.12.2014 with CODE 258 (COLLISION PREVENTION ASSIST PLUS)) | COLLISION PREVENTION ASSIST controller unit (A90) | CAN E1/CAN E2 | COLLISION PREVENTION ASSIST warning lamp (A1e52) | - | X |
| Damping system (with CODE 483 (ADVANCED AGILITY package)) | Adaptive damping system control unit (N51/5) | CAN E1/CAN E2 | - | X | - |
| DISTRONIC PLUS (with CODE 233 (DISTRONIC PLUS)) | Radar sensors control unit (N62/1) | Flex E/CAN E2 | DISTRONIC warning lamp (A1e59) | - | X |
| Anti-theft alarm system (ATA) (with CODE 551 (Anti-theft alarm system (ATA))) | Rear SAM control unit with fuse and relay module (N10/2) | CAN B | - | X | - |
| Parking system (with CODE 235 (Active Parking Assist)) | Parking system control unit (N62) | CAN E2 | - | X | X |
| Electronic Stability Program (ESP®) | Electronic Stability Program control unit (N30/4) | CAN E1/CAN E2 | ESP®/ASR OFF warning lamp (A1e32) (status ESP® ON/OFF), Electronic Stability Program warning lamp (A1e41) (ESP® system active) | X | - |
| Parking brake warning | Front SAM control unit with fuse and relay module (N10/1) | CAN B | Brake system warning lamp (A1e51) (without CODE 494 (USA version)) | X | - |
| Windshield washer system fluid level | Front SAM control unit with fuse and relay module (N10/1) | CAN B | - | X | - |
| Speed warning (with CODE 623 (Gulf States version)) | Instrument cluster (A1) | Internal | - | X | X |
| Seat belt reminder warning | Supplemental restraint system control unit (N2/10) | CAN E1/CAN E2 | Seat belt warning lamp (A1e9) | - | X |
| Rear SAM control unit with fuse and relay module (N10/2) | CAN B | - | X | X | |
| KEYLESS-GO (with CODE 889 (Keyless-Go)) | KEYLESS-GO control unit (N69/5) | CAN B | - | X | X |
| Coolant level | Front SAM control unit with fuse and relay module (N10/1) | CAN B | - | X | - |
| Coolant temperature | CDI control unit (N3/9) (with diesel engine) or ME-SFI [ME] control unit (N3/10) (with gasoline engine) | CAN E1/CAN E2 | Coolant temperature warning lamp (A1e54) | X | - |
| Lights on warning | Front SAM control unit with fuse and relay module (N10/1) | CAN B | - | X | X |
| Steer Assist (with CODE 266 (Steer Assist)) | Radar sensors control unit (N62/1) Stereo multifunction camera (A40/13) | Flex E/CAN E2 | - | - | - |
| Memory adjustment (with CODE 275 (Memory package (driver seat, steering column, mirrors)) or CODE 242 (Electrically adjustable front passenger seat with memory)) | Driver seat control unit (N32/1) or front passenger seat control unit (N32/2) | CAN B | - | - | X |
| Engine diagnosis | CDI control unit (N3/9) (with diesel engine) or ME-SFI [ME] control unit (N3/10) (with gasoline engine) | CAN E1/CAN E2 | Engine diagnosis indicator lamp (A1e58) | X | - |
| Engine oil level warning | CDI control unit (N3/9) (with diesel engine) or ME-SFI [ME] control unit (N3/10) (with gasoline engine) | CAN E1/CAN E2 | - | X | - |
| Emergency call system (with CODE 348 (Emergency call/assist system) or CODE 359 (TELEAID emergency call system)) | Emergency call system control unit (N123/4) | CAN D/CAN B | - | X | - |
| PRE-SAFE® | Left front reversible emergency tensioning retractor (A76) or right front reversible emergency tensioning retractor (A76/1) | CAN E1/CAN E2 | - | X | - |
| Tire pressure monitor (with CODE 475 (Tire pressure monitor (premium), Schrader)) | Tire pressure monitor control unit (N88) | CAN E2 | Tire pressure monitor warning lamp (A1e66) | X | - |
| Tire pressure loss warner (without CODE 475 (Tire pressure monitor (premium), Schrader)) | Electronic Stability Program control unit (N30/4) | CAN E1/CAN E2 | - | X | - |
| Power steering | Electrical power steering control unit (N68) | CAN E2 | - | X | - |
| Supplemental restraint system | Supplemental restraint system control unit (N2/10) | CAN E1/CAN E2 | Supplemental restraint system indicator lamp (A1e15) | X | - |
| Lane Keeping Assist (with CODE 476 (Lane Keeping Assist)) | Multifunction camera (A40/11) | CAN E2 | - | X | - |
| Stationary heater (with CODE 228 (Stationary heater)) | Stationary heater control unit (A6n1) | CAN B | - | X | - |
| Fuel cap warning (with CODE 494 (USA version)) | CDI control unit (N3/9) (with diesel engine) or ME-SFI [ME] control unit (N3/10) (with gasoline engine) | CAN E1/CAN E2 | Fuel reserve warning light (A1e4) | X | - |
| Cruise control | Electronic Stability Program control unit (N30/4) | CAN E1/CAN E2 | Segment ring in speedometer (A1p8) | X | X |
| Blind Spot Assist (with CODE 234 (Blind Spot Assist)) | Left rear bumper intelligent radar sensor (B29/4) or right rear bumper intelligent radar sensor (B29/5) | CAN E1/CAN E2 | - | - | X |
| Blind Spot Assist (with CODE 237 (Active Blind Spot Assist)) | Radar sensors control unit (N62/1) | Flex E/CAN E2 | - | - | X |
| Door warning (doors, engine hood, trunk lid) | Front SAM control unit with fuse and relay module (N10/1), Rear SAM control unit with fuse and relay module (N10/2), Left front door control unit (N69/1) and right front door control unit (N69/2) |
CAN B | - | X | X |
| Soft top warning (model 207.4) | Rear control unit (N22/6) | CAN B | X | - | |
| Traffic Sign Assist (with CODE 513 (Traffic sign recognition)) | Multifunction camera (A40/11) (without CODE 23P (Driving assistance package PLUS)) Stereo multifunction camera (A40/13) (with CODE 23P (Driving assistance package PLUS)) | CAN E2 Flex E/CAN E2 | - | X | - |
| Preglow indicator (on diesel engine) | CDI control unit (N3/9) | CAN E1/CAN E2 | Preglow indicator lamp (A1e16) | - | - |
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 instrument cluster evaluates the following information for issuing a country-specific seat belt reminder warning:
- Transmitted by Supplemental Restraint System control unit over chassis CAN 1:
- Status of driver seat belt buckle restraint system switch (S68/3)
- Status of front passenger seat belt buckle restraint system switch (S68/4)
- Front passenger seat occupied status
- Sent by rear SAM control unit with fuse and relay module via interior CAN:
- Status of left rear seat belt buckle switch (S68/5)
- Status of right rear seat belt buckle switch (S68/6)
The seat belt reminder message for the front passenger is only issued, if the front passenger seat is recognized as occupied. The rear seat belt reminder warning is only issued, if the status of a rear seat belt buckle switch changes during a journey.
If a seat belt that is not fitted is detected, the supplemental restraint system control unit sends a corresponding signal over the chassis CAN 1, front SAM control unit and chassis 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.
Countries with legally prescribed seat belt reminder:
Extended NCAP: USA
Countries without seat belt reminder warning prescribed by law:
European New Car Assessment Program (Euro NCAP): Europe, China, Australia, Canada, Japan, Korea and Arab States of the Gulf.
In countries in which the seat belt reminder is prescribed by law (extended NCAP), the seat belt warning lamp is activated for a time interval of t = 6 ± 2 s. It is irrelevant here whether the driver seat belt is fitted or not. If the driver's seat belt is not being worn, the instrument cluster also issues an acoustic warning over the warning buzzer.
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 reminder warning is not prescribed by law, the seat belt warning lamp is only actuated during the indicator lamp test.
Immediately after detecting an engine start ("Engine running" or "Drivetrain operational" signal set), both the status of the driver restraint system seat belt buckle switch and the status of the front-passenger restraint system seat belt buckle switch are evaluated. If a seat belt is defined to not be fitted, the instrument cluster actuates the seat belt warning lamp.
If the vehicle starts to move, additional successive acoustic warnings are issued once it reaches a speed of v ≥25 km/h.
Three or four acoustic warnings are issued in accordance with the seat belt reminder warning. While they are being issued the seat belt warning lamp is actuated by flashing it 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 acoustic warning is sounded at an interval of t = 4 s. The acoustic warning phase 1 lasts for a maximum t = 20 s. This is then followed by a transition to acoustic warning phase 2.
Acoustic warning phase 2:
After expiry of acoustic warning phase 1 and at a speed of v ≥25 km/h, a quiet warning tone is sounded for max. t = 20 s at an interval of t = 2 s. The transition into warning phase 3 follows.
Acoustic warning phase 3:
After expiry of acoustic warning phase 2 and at a speed of v ≥25 km/h, a quiet acoustic warning is sounded for max. t = 20 s at an interval of t = 1 s. The transition into warning phase 4 follows.
Acoustic warning phase 4 (Euro NCAP only): After expiry of acoustic warning phase 3 and at a speed of v ≥25 km/h, a loud warning tone is sounded for max. t = 93 s at an interval of t = 0.5 s.
Cancellation of seat belt reminder warning:
- The last acoustic warning phase is fully completed.
- 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 is detected from the time the "Engine running" or "Drive train operational" signal is set.
The rear seat belt reminder warning is realized by monitoring the number of belt tabs inserted into the seat belt buckles. If this situation alters during a journey or at vehicle standstill, without a rear door being opened, the instrument cluster actuates the seat belt warning lamp and the warning buzzer to issue the rear seat belt reminder warning.
If the seat belt reminder warning is issued when the vehicle is moving, it is displayed again another t = 30 s when the vehicle is determined to be at rest. This is contingent on a change in the door status for a rear door while the vehicle is at a standstill. 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.
| Electrical function schematic of instrument cluster, control/warning message | PE54.30-P-2054-97EAB | ||
| Overview of system components, instrument cluster (IC) component description | GF54.30-P-9996CA |