Page 169 of 222

Brake
Problem Possible causes/consequences and
0050
0050Solutions 00DF
(USA only)
0025 (Canada only)
The ABS indicator
lamp illuminates
while the drive system
is running. There is a malfunction in the ABS system.
X
Have the ABS system checked at an authorized electric drive
smart center immediately. 00DF
(USA only)
0025 (Canada only)
The ABS indicator
lamp illuminates
together with the
brake warning lamp
0027 (USA only) or
004D (Canada only)
while the drive system
is running. The ABS system fails.
X
Stop the vehicle immediately in a safe location.
X Do not continue to drive.
X Switch off the drive system.
X Engage the parking brake when leaving the vehicle.
X Contact Roadside Assistance or an authorized electric drive
smart center. G
WARNING
When the ABS system is malfunctioning, the wheels may lock during hard braking, reducing
steering capability and extending the braking distance.
When the ABS is switched off due to a malfunction, the ESP ®
is also switched off. The basic
driving and braking functions are still available.
The risk of your vehicle skidding is then increased in certain situations. You should
therefore always adapt your speed and driving style to the prevailing road and weather
conditions. Problem Possible causes/consequences and
0050 0050Solutions 0027
(USA only)
004D (Canada only)
The brake warning
lamp illuminates
while the drive system
is running. You are driving with the parking brake engaged.
X
Release the parking brake. The brake circuit fails or the brake fluid level in the brake
fluid reservoir is too low.
X
Stop the vehicle immediately in a safe location.
X Do not continue to drive.
X Switch off the drive system.
X Do not add brake fluid as this will not solve the problem.
X Engage the parking brake when leaving the vehicle.
X Contact Roadside Assistance or an authorized electric drive
smart center. What to do if ...
167>> Practical hints. Z
Page 170 of 222

G
WARNING
Driving with the brake warning lamp illuminated can result in an accident. Have your brake
system checked immediately if the brake warning lamp stays on.
Do not add brake fluid before checking the brake system.
! If you find that the brake fluid in the brake fluid reservoir has fallen to the minimum
mark or below, have the brake system checked for brake pad thickness and leaks imme-
diately. Contact an authorized electric drive smart center immediately. Do not add
brake fluid as this will not solve the problem.
Safety systems Problem Possible causes/consequences and
0050 0050Solutions 0076
The seat belt
telltale illu-
minates con-
stantly for a
maximum of
6 seconds after
starting the
drive system. Regardless of whether the seat belt is fastened or not, the seat
belt telltale always comes on and remains lit for 6 seconds
after starting the drive system.
X
Fasten your seat belts. 0076
The seat belt
telltale illu-
minates con-
stantly. An
additional
warning chime
sounds for a
maximum of
6 seconds after
starting the
drive system. The driver’s seat belt is unfastened.
X
Fasten your seat belts. 0076
The seat belt
telltale flashes
with increas-
ing frequency
of a warning
chime for a
maximum of
60 seconds. The vehicle speed once exceeds 15 mph (25 km/h), and both the
driver’s and passenger seat belt are unfastened.
X
Fasten your seat belts.
If the driver’s or the passenger seat belt remains unfastened
after 60 seconds, the warning chime stops sounding. The seat
belt telltale stops flashing but continues to be illuminated.
The seat belt telltale will only go out if both the driver’s and
the passenger seat belt (with the passenger seat occupied) are
fastened, or the vehicle is standing still and a door is opened. 168
What to do if ...>> Practical hints.
Page 171 of 222

Problem Possible causes/consequences and
0050
0050Solutions 0075
Scenario 1:
The SRS indica-
tor lamp illu-
minates when
the ignition is
switched on and
goes out after a
maximum of
4 seconds. The subsequent self check of the safety systems detected no
malfunction. The supplemental restraint system is opera-
tional.
0075
Scenario 2:
The SRS indica-
tor lamp illu-
minates when
the ignition is
switched on and
goes out after a
maximum of
4 seconds for
approximately
1 second, then it
comes on again
and stays on. There is a malfunction in the supplemental restraint systems.
The air bags or Emergency Tensioning Devices could deploy
unexpectedly or fail to deploy in an accident.
X
Do not sit on the passenger seat; this applies particularly
to children.
X Have the system checked at an authorized electric drive
smart center. G
WARNING
If the SRS indicator lamp does not come on when you switch on the ignition or does not go
out again after a few seconds once the drive system is running or comes on again, the sup-
plemental restraint systems are malfunctioning.
In the event that a malfunction of the SRS is indicated as described in scenario 2, the SRS
may not be operational. For your safety, we strongly recommend that you contact an author-
ized electric drive smart center immediately to have the system checked; A malfunctioning
SRS system may not deploy when needed in an accident resulting in serious or fatal injury,
or it might deploy unexpectedly and unnecessarily which could result in an accident and/
or injury to you or to others.
! If the SRS indicator lamp comes on while driving, have the system checked at an
authorized electric drive smart center immediately.
It is possible that the air bag and the emergency tensioning device could be activated
unintentionally or will not function in the event of an accident.
i Information on the operating principle of the air bags can be found in the “Safety”
section (Y page 33). What to do if ...
169>> Practical hints. Z
Page 172 of 222

Problem Possible causes/consequences and
0050
0050Solutions 00E5
The ESP ®
warn-
ing lamp
flashes while
driving. The ESP
®
has engaged because of detected traction loss in at
least one tire.
X When driving off, apply as little throttle as possible.
X While driving, ease up on the accelerator pedal.
X Adapt your speed and driving to the prevailing road and
weather conditions. 00E5
The ESP ®
warn-
ing lamp illu-
minates con-
tinuously while
the drive sys-
tem is running. The ESP
®
is not operational due to a system failure.
X Have the system checked at an authorized electric drive
smart center. The ESP
®
is not available.
X Have the system checked at an authorized electric drive
smart center. G
WARNING
When the ESP ®
warning lamp is illuminated continuously, the ESP ®
is not available or not
operational due to a system failure.
Adapt your speed and driving to the prevailing road conditions and the non-operating status
of the ESP ®
.
i It may be possible to clear a system failure by restarting the drive system.
X Restart the drive system.
If the warning lamp still does not go out, have the system checked at an authorized
electric drive smart center immediately.
i More information on the ESP ®
can be found in the “Safety” section (Y page 47).Problem Possible causes/consequences and
0050 0050Solutions 0052
The yellow EPS
warning lamp
illuminates
while the drive
system is run-
ning. The Electronic Power Steering (EPS)* is not available.
X
Have the EPS checked at an authorized smart electric drive
center immediately. G
WARNING
When the EPS is not available a higher degree of effort is necessary to steer the vehicle.
Have the system checked at an authorized electric drive smart center. 170
What to do if ...>> Practical hints.
* optional
Page 173 of 222

Vehicle
Problem Possible causes/consequences and
0050
0050Solutions 003D
The red 12-V-
battery indica-
tor lamp illu-
minates while
driving or does
not go out after
the drive sys-
tem is started. The 12-V-battery is not being charged.
X
Stop the vehicle immediately in a safe location.
X Do not continue to drive.
X Switch off the drive system.
X Engage the parking brake when leaving the vehicle.
X Contact Roadside Assistance or an authorized electric drive
smart center. 0075
The yellow
high-voltage
battery warn-
ing lamp comes
on while driv-
ing. There may be a malfunction in the high-voltage system.
Contact an authorized electric drive smart center immediately
and have the high-voltage system checked.
0057
The high‑beam
headlamp indi-
cator lamp does
not illuminate
when the
high‑beam
headlamps are
switched on or
when using the
high‑beam
flasher. The high‑beam headlamp indicator lamp has failed.
X
Have the high‑beam headlamp indicator lamp checked at an
authorized electric drive smart center. 0059
The low‑beam
headlamp indi-
cator lamp does
not illuminate
when the
low‑beam head-
lamps are
switched on. The low‑beam headlamp indicator lamp has failed.
X
Have the low‑beam headlamp indicator lamp checked at an
authorized electric drive smart center. What to do if ...
171>> Practical hints. Z
Page 174 of 222

Problem Possible causes/consequences and
0050
0050Solutions 003E003D
The turn signal indi-
cator lamp(s) do(es)
not illuminate when
the ignition is
switched on and the
corresponding turn
signal is switched on
or the hazard warning
flasher is switched
on. The turn signal indicator lamp(s) has (have) failed.
X
Have the turn signal indicator lamp(s) checked at an author-
ized electric drive smart center. 003E003D
The turn signal indi-
cator lamp(s) flashes
at double frequency. One of the turn signals is malfunctioning.
X
Replace the bulb as soon as possible (Y page 180).
or
X Have the turn signal checked at an authorized electric drive
smart center as soon as possible. Drive system
Problem Possible causes/consequences and
0050 0050Solutions 00AC
The red coolant
temperature
warning lamp
illuminates. The coolant is too hot. The high-voltage battery and/or the
drive system are not cooled sufficiently.
X
Stop the vehicle immediately in a safe location.
X Switch off the drive system.
X Engage the parking brake when leaving the vehicle.
X Contact Roadside Assistance or an authorized electric drive
smart center. 172
What to do if ...>> Practical hints.
Page 175 of 222

Problem Possible causes/consequences and
0050
0050Solutions 00ED
The yellow
drive diagnos-
tics indicator
lamp comes on
while driving. There may be a malfunction in the drive system.
X
Have the vehicle checked at an authorized electric drive
smart center immediately. 00ED
The red drive
diagnostics
warning lamp
comes on while
driving. There may be a malfunction in the drive system.
X
Stop the vehicle immediately in a safe location.
X Do not continue to drive.
X Switch off the drive system.
X Engage the parking brake when leaving the vehicle.
X Contact Roadside Assistance or an authorized electric drive
smart center. Tire Pressure Monitoring System (TPMS)*
Problem Possible causes/consequences and
0050 0050Solutions 0077
The yellow com-
bination low
tire pressure/
TPMS malfunc-
tion telltale
illuminates
continuously. The TPMS detects a loss of pressure in at least one tire.
X
Carefully bring the vehicle to a halt, avoiding abrupt steer-
ing and braking maneuvers. Observe the traffic situation
around you.
X Check and correct tire inflation pressure as required
(Y page 129).
If the tire inflation pressure in the respective tire(s) has
(have) been corrected, the combination low tire pressure/TPMS
malfunction telltale goes out after a few minutes of driving.
See also “Restarting the TPMS” (Y page 132).0077
The combina-
tion low tire
pressure/TPMS
malfunction
telltale flashes
60 seconds and
then stays illu-
minated. There is a malfunction in the TPMS.
X
Have the TPMS checked at an authorized electric drive smart
center.
After the malfunction has been remedied the combination low
tire pressure/TPMS malfunction telltale goes out after a few
minutes of driving. G
WARNING
Each tire should be checked monthly when cold and inflated to the inflation pressure rec-
ommended by the vehicle manufacturer on the Tire and Loading Information placard. If your
vehicle has tires of a different size than the size indicated on the Tire and Loading Infor-
mation placard, you should determine the proper tire inflation pressure for those tires. What to do if ...
173>> Practical hints.
* optional Z
Page 176 of 222

As an added safety feature, your vehicle has been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires
is significantly underinflated.
Accordingly, when the low tire pressure telltale illuminates, you should stop and check your
tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly
underinflated tire causes the tire to overheat and can lead to tire failure.
Underinflation also increases energy consumption, reduces tire tread life, and may affect
the vehicle’s handling and stopping ability. Please note that the TPMS is not a substitute
for proper tire maintenance, and it is the driver’s responsibility to maintain correct tire
pressure, even if underinflation has not reached the level to trigger illumination of the
TPMS low tire pressure telltale.
Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when
the system is not operating properly. The TPMS malfunction indicator is combined with the
low tire pressure telltale. When the system detects a malfunction, the telltale will flash for
approximately 1 minute and then remain continuously illuminated.
This sequence will continue upon subsequent vehicle start-ups as long as the malfunction
exists. When the malfunction indicator is illuminated, the system may not be able to detect
or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of reasons, including the installation of incom-
patible replacement or alternate tires or wheels on the vehicle that prevent the TPMS from
functioning properly. Always check the TPMS malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure that the replacement or alternate tires and
wheels allow the TPMS to continue to function properly. 174
What to do if ...>> Practical hints.