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Indicator lamps which light up in the light switch are described in the chapter Lights Lig
Symbol Meaning 
  Central warning lamp. Observe the additional information on the instrument cluster 
display. 
  Electronic parking brake  Operating the electronic parking brake. 
  Brake system fault   
  Electromechanical steering not functioning  Troubleshooting. 
  Fasten seat belt  Warning lamp. 
  Collision warning from area monitoring system (Front Assist)  Warning levels and 
 
  Depress the brake pedal. 
  Check brake pads  Troubleshooting. 
  Central warning lamp. Observe the additional information on the instrument cluster 
display. 
  Electronic Stability Control (ESC) OR traction control system (TCS)   TCS regulating 
to  
  Traction control system (TCS) switched off   TCS regulating to prevent the wheels 
 
  Fault in anti-lock brake system (ABS)    
  Fault in electronic parking brake  TroubleshootingOR: fault in Hill Start Assist   
 
  Rear fog light switched on  Switching the fog lights on and off. 
  Vehicle lighting is not working    
  Fault in exhaust system   Fault  
  Fault in engine management system  Troubleshooting.  
     
        
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Fig. 101 On the right-hand side of the steering column: emergency start function in vehicles with the 
keyless locking and starting system Keyless Access. 
Fault in engine management system 
The indicator lamp lights up yellow. 
Fault in the engine management system. 
The engine should be checked by a qualified workshop as soon as possible. 
Engine speed limited 
The indicator lamp lights up yellow. 
The engine speed was limited to prevent the engine from overheating. 
The engine speed is shown on the instrument cluster display. 
The engine speed limitation will be cancelled again in the following cases: 
Engine is no longer in a critical temperature range. 
Foot is taken off the accelerator. 
together with engine speed limitation due to fault in the engine management system 
The indicator lamps light up yellow. 
Engine speed limitation is activated due to a fault in the engine management system. 
Make sure that the displayed engine speed is not exceeded. 
The engine should be checked by a qualified workshop as soon as possible. 
Glow plug system/engine management system 
Vehicles with diesel engine: 
The indicator lamp lights up yellow. 
When the diesel engine is being pre-heated, the indicator lamp lights up in the instrument cluster for 
a few seconds.  
     
        
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-volt vehicle battery 
-volt vehicle 
battery. 
e cable and then the negative cable  
Various indicator lamps may light up after the 12-volt vehicle battery has been connected and the 
ignition is switched on. They will go out when you drive a short distance at a speed of approximately 
15 20 km/h (10 12 mph). If the indicator lamps remain lit up, the vehicle should be checked by a 
qualified workshop. 
If the 12-volt vehicle battery was disconnected for an extended period, the system may not able to 
calculate or correctly display the time when the next service is due Instrument cluster
the maximum permissible service intervals Service 
Automatic switch-off for electrical consumers 
The intelligent vehicle electrical system management function automatically implements a range of 
measures to prevent the 12-volt vehicle battery from discharging under high loads: 
 
 
power supply to the 12-volt socket and the cigarette lighter may be interrupted temporarily 
while the engine is being started. 
The vehicle electrics management system cannot always prevent the 12-volt vehicle battery from 
being discharged, for example if the ignition is left on over a long period with the engine off or the 
side lights or parking lights are left on over a long period of time. 
12-volt vehicle battery is discharged 
gnition is switched on. 
 
Auxiliary heater and ventilation 
 
WARNING 
Incorrectly mounting the battery and using incorrect 12-volt vehicle batteries can cause short 
circuits, fire and serious injuries. 
-free and leak-proof 12-volt vehicle batteries that have the same 
properties, specifications and dimensions as the factory-fitted 12-volt vehicle battery. 
 
WARNING 
A highly explosive mixture of gases is given off when the 12-volt vehicle battery is being charged.