Instrument cluster (IC), function - GF54.30-P-0002GR
MODEL 166 up to model year 2016
Instrument cluster, general
The instrument cluster notifies the driver of all dynamic and static driving conditions as well as about the current condition of the systems installed in the vehicle. In the event of faulty vehicle functions or functions relevant to safety, corresponding warnings are issued via the instrument cluster.
The following displays are incorporated into the instrument cluster in order to be able to convey information to the driver:
- Permanent displays (e.g. vehicle speed, rotational speed, tank contents)
- Indicator lamps (green, yellow or blue) (e.g. turn signals, high beams)
- Warning lamps (red) (e.g. coolant level, brake fluid level)
- Multifunction display (e.g. outside temperature indicator, travel distance display)
The function description for the "Instrument cluster (KI) function" contains the following functions:
- Function sequence for activate instrument cluster
- Function sequence for indicator lamp test
Further functions are described in separate documents:
- Control/warning messages, function
- Display operating conditions, function
- Comfort displays, function
- Trip computer, function
- Settings on workshop level, function
- Active service system (ASSYST PLUS), function
Function sequence for activate instrument cluster
The background illumination of the instrument cluster's multifunction display is activated when the interior CAN is woken up, e.g. through:
- Unlocking vehicle using radio or infrared
- Opening or closing driver door
- Change in circuit 15C status
When "bus idle" occurs, the instrument cluster remains active for t = 40 seconds. If a fault exists this time is increased to t = 120 s.
The following events activate the background illumination of the multifunction display and the scale illumination of the instrument cluster:
- Standing light ON (circuit 58) (except model 166.074/874)
- Circuit 15R ON
After switching off circuit 15R, the instrument cluster remains active for t = 40 s. If a fault exists this time is increased to t = 120 s.
Additional function requirements for indicator lamp test
- Terminal 15 ON
The electronic ignition lock control unit sends the status of circuit 15 over interior CAN and chassis CAN 2 to the instrument cluster.
Function sequence for indicator lamp test
The indicator lamp test serves the function test of certain warning lamps and indicator lamps in the instrument cluster. The instrument cluster carries out this test automatically each time terminal 15 is switched on.
The function of the following warning and indicator lamps is checked during the indicator lamp test:
- Fuel reserve indicator lamp
- Seat belt warning lamp
- Supplemental restraint system indicator lamp
- Antilock brake system indicator lamp
- ESP®/ASR OFF warning lamp
- Electronic Stability Program warning lamp
- Brake system warning lamp
- COLLISION PREVENTION ASSIST warning lamp (with CODE 252 (COLLISION PREVENTION ASSIST))
- Coolant temperature warning lamp
- Engine diagnosis indicator lamp
- DISTRONIC warning lamp (with CODE 233 (DISTRONIC PLUS))
- Tire pressure monitor warning lamp (with CODE 475 (Tire pressure monitor (Premium)), Schrader)
- Brake force distribution warning lamp
The indicator lamp test is terminated when the engine is started.
The function of the following indicator lamps is not checked:
- Left turn signal indicator light
- Right turn signal indicator light
- High beam indicator lamp
- Preglow indicator lamp (on diesel engine)
- Rear fog lamp indicator lamp
- Standing lights indicator lamp (as of 01.07.2012)
- Low beam indicator lamp
Detailed information on the warning and indicator lamps is available in the "Instrument cluster component description" document.
| Instrument cluster (IC), operating information | GF54.30-P-0002-05GR |
| Control/warning messages, function | GF54.30-P-2001GR |
| Display operating conditions, function | GF54.30-P-3041GR |
| Comfort displays, function | GF54.30-P-3043GR |
| Trip computer, function | GF54.30-P-3044GR |
| Settings on workshop level, function | GF54.30-P-2020GR |
| Active service system (ASSYST PLUS), function | GF00.20-P-0004GR |