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12CauseHow to respondIndicator lamp 1 lights up:Engine malfunction with adverse effect on
emissions.You can continue your journey, but
moderate your speed and exercise
due caution. Have the vehicle
checked as soon as possible.Lights up in red:The engine is overheating.Carefully bring the car to a stop,
switch off the engine and allow it to
cool down. Do not open the hood;
otherwise, there would be a risk of
injury due to scalding. Contact your
service center.Lights up in yellow:The engine is too hot.Continue driving at more moderate
speed so that the engine can cool
down. Have the engine checked
without delay if the situation reoc‐
curs.Lights up in red:Battery is no longer being charged. Alterna‐
tor malfunction.Switch off all unnecessary electrical
consumers. Have the power supply
system checked without delay.Lights up in yellow:The battery charge level is very low, the bat‐
tery is old or is not securely connected.Charge the battery by taking a long
drive or using an external charger.
If necessary, switch off automatic
power consumers. Have the battery
checked as soon as possible.Indication in US models
The parking brake is set.Indication in Canadian models
The parking brake is set.Seite 194MOBILITYIndicator/warning lamps194
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12CauseHow to respondIndication in US models
The parking brake is set while driving.Release the parking brake.Indication in Canadian models
The parking brake is set while driving.Release the parking brake.Indication in US modelsLights up in red:
The brake fluid level is too low.Reduced braking effect, stop the
car carefully. Contact the nearest
service center.Indication in Canadian modelsLights up in red:
The brake fluid level is too low.Reduced braking effect, stop the
car carefully. Contact the nearest
service center.Indication in US models.Brake pads worn.Have the condition of the brake
pads checked without delay.Indication in Canadian modelsBrake pads worn.Have the condition of the brake
pads checked without delay.Indication in US modelsThe vehicle electronics have failed.You cannot continue your journey.
Contact your service center.Seite 195Indicator/warning lampsMOBILITY195
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12CauseHow to respondIndication in Canadian modelsThe vehicle electronics have failed.You cannot continue your journey.
Contact your service center.Lights up in red:Have the system in question
checked immediately.The starter has failed orThe engine cannot be restarted.Ignition malfunctioning. The engine can
only be restarted when the brake is de‐
pressed or
Lighting system failed. Low beams/tail lights
and brake lights still operational. All other
lights failed.Depress the brake to restart the en‐
gine.Lights up in yellow:Brake light control failed or
The fuel supply is malfunctioning.You can continue your journey, but
moderate your speed and exercise
due caution. Have the system in
question checked immediately.Drive malfunctioning.You can continue your journey, but
moderate your speed and exercise
due caution. Transmission limp-
home program with reduced accel‐
eration is active. Have the system
checked immediately.Flashing:
Dynamic Stability Control DSC or Dynamic
Traction Control DTC is controlling drive and
braking forces, refer to page 81.Dynamic Traction Control DTC is activated,
refer to page 82.Dynamic Stability Control DSC and Dynamic
Traction Control DTC are deactivated, refer
to page 81.Driving stability limited during ac‐
celeration and cornering.
Driving style must be readjusted.Seite 196MOBILITYIndicator/warning lamps196
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12CauseHow to respondThe Flat Tire Monitor was not initialized.Initialize the Flat Tire Monitor, refer
to page 74.Light up in yellow:Flat Tire Monitor failed. Punctures are not
indicated.Have the system checked.In vehicles with the Tire Pressure MonitorLight up in yellow and red:There is a flat tire or substantial loss of tire
pressure.Carefully bring the car to a stop.
Additional information, refer to
page 76.In vehicles with the Tire Pressure MonitorLight up in yellow:Tire Pressure Monitor not initialized.Check the inflation pressure and re‐
set the system, refer to page 76.The small light flashes yellow and then stays
on, the large light lights up in yellow:Tire Pressure Monitor failed. Punctures are
not indicated.Have the system checked.A wheel without TPM electronics is
mounted.Have the system checked.TPM is temporarily malfunctioning due to
other systems or devices using the same
radio frequency.In vehicles with the Tire Pressure MonitorThe small light flashes yellow and then stays
on, the large light lights up in yellow:Tire Pressure Monitor failed. Punctures are
not indicated.Have the system checked.A wheel without TPM electronics is
mounted.Have the system checked.Seite 199Indicator/warning lampsMOBILITY199
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12CauseHow to respondLights up in red:Transmission limp-home program active
with restricted range of gears, possibly with
reduced acceleration.You can continue your journey, but
moderate your speed and exercise
due caution. Have the system
checked immediately.Gears can be engaged without depressing
the brake.Always depress the brake to en‐
gage a gear.Automatic selector lever locked:Manually unlock the selector lever
lock, refer to page 57.Lights up in yellow:Have the system checked as soon
as possible.Automatic selector lever locked:
The selector lever is locked in position P
with the engine running or the ignition
switched on and the brake depressed orManually unlock the selector lever
lock, refer to page 57.The brake signal is malfunctioning: a gear
can be engaged without depressing the
brake.To engage a gear while the vehicle
is at a standstill, always depress the
brake. Before leaving the vehicle,
move the selector lever to position
P and switch off the engine.Lights up in red:The transmission is overheating.Bring the car to a stop and move
the selector lever to position P. Al‐
low the transmission to cool down.
You can continue your journey, but
moderate your speed and exercise
due caution. Have the system
checked if the situation reoccurs.Lights up in yellow:The transmission is too hot.Avoid high engine loads. You can
continue your journey, but moder‐
ate your speed and exercise due
caution.Seite 200MOBILITYIndicator/warning lamps200
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12CauseHow to respondSelector lever position P not engaged. The
vehicle is not secured against rolling.Selector lever position P not engaged. The
ignition cannot be switched off.Engage selector lever position P
when you wish to switch off the ig‐
nition, refer to page 48.The cruise control system has failed.Have the system checked.The Park Distance Control has failed.Have the system checked.A bulb of the exterior lighting system has
failed.Have the exterior lighting checked
as soon as possible.A low-beam headlight or front fog light has
failed.Have the lights checked as soon as
possible.A high-beam headlight has failed.Have the high-beam headlights
checked.A rear fog light has failed.Have the rear fog lights checked.The headlight beam throw adjustment has
failed.Have the headlight beam throw
adjustment system checked.The Adaptive Light Control has failed.The coolant level is too low.Add coolant immediately, refer to
page 168.The engine oil pressure is too low.Stop immediately and switch off
the engine. You cannot continue
your journey. Contact your service
center.Lights up in red:Seite 201Indicator/warning lampsMOBILITY201
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12CauseHow to respondThe service appointment is overdue.Arrange a service appointment.
Check the service requirements, re‐
fer to page 63.Lights up in yellow:Service is due.Arrange a service appointment.
Check the service requirements, re‐
fer to page 63.No service due.The set speed limit was exceeded.The time and date are no longer correct.Set the time and date, refer to
page 62.Seite 202MOBILITYIndicator/warning lamps202
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Everything from A to ZIndexA
ABS, Antilock Brake Sys‐ tem 81
Acoustic signal, refer to Check Control 64
Activated charcoal filter with automatic climate con‐
trol 92
Adaptive Light Control 68
Additives, engine oil 167
Airbags 71
Airbags, indicator/warning light 74
Air circulation, refer to Recir‐ culated air mode, air condi‐
tioner 89
Air circulation, refer to Recir‐ culated air mode, automatic
climate control 91
Air conditioning 88
Air conditioning mode, air conditioner 88
Air conditioning mode, auto‐ matic climate control 90
Air distribution, air condi‐ tioner, manual 89
Air distribution, automatic 91
Air distribution, automatic cli‐ mate control, manual 92
Air distribution, individual 89
Air drying, refer to Cooling function 92
Air flow rate for air condi‐ tioner 89
Air flow rate with automatic climate control 91
Air pressure, refer to Tire infla‐ tion pressure 152
Air supply, air conditioner 88 Air supply, automatic climate
control 90
Alarm system 30
Alarm system, avoiding unin‐ tentional alarms 31
Alarm system, ending an alarm 30
Alarm system, interior motion sensor 31
Alarm system, tilt alarm sen‐ sor 31
ALL4 all-wheel system 83
All-wheel drive, refer to ALL4 83
Alternating-code hand-held transmitter 95
Ambient lighting 70
Antifreeze, washer fluid 54
Antilock Brake System, ABS 81
Anti-slip control, refer to Dy‐ namic Stability Control
DSC 81
Anti-theft protection 21
Approved engine oils 167
Ashtray 98
Assistance, roadside 181
Assistance when driving off, refer to Hill drive-off assis‐
tant 83
Assistance with starting en‐ gine, refer to Jump-start‐
ing 181
Automatic air distribution 91
Automatic air flow 91
Automatic car wash 186
Automatic climate control 90
Automatic climate control, au‐ tomatic air distribution 91
Automatic, cruise control 85 Automatic headlight con‐
trol 66
Automatic transmission with Steptronic 55
AUTO program with auto‐ matic climate control 91
AUX-IN port 130
Average fuel consumption 60
Average fuel consumption, setting the units 61
Average speed 60
Average speed, refer to Com‐ puter 59
B Backrest curvature, refer to Lumbar support 36
Backrests, refer to Seats 35
Backup lights, bulb replace‐ ment 176
Battery disposal 30
Battery, refer to Vehicle bat‐ tery 179
Battery, remote control 20
Battery replacement, remote control 30
Belts, refer to Safety belts 37
Belt tensioners, refer to Safety belts 37
Bi-xenon headlights 172
Brake assistant 81
Brake discs, breaking in 110
Brake fluid, refer to Service re‐ quirements 63
Brake force distribution, elec‐ tronic 81
Brake pads, breaking in 110
Brake, refer to Parking brake 50 Seite 210REFERENCEEverything from A to Z210
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