Page 474 of 557
Display messages
Possible causes/consequences and M
MSolutions
8 Reserve fuel level *T
he fuel le vel has dropped into there ser verange. #
Refuel.
Ø
Eng. start not possible in
XXX mi *
The AdBlue ®
sy stem is malfunctioning. #
Consult a qualified specialist workshop immediatel y.
¸
Replace air cleaner *
Ve hicles with a diesel engine: the engine air filter is dirty and must be replaced. #
Consult a qualified specialist workshop.
Ø Eng. start not possible *
The AdBlue ®
sy stem is malfunctioning. You can no lon gerst art the engine. #
Consult a qualified specialist workshop immediatel y. Displ
aymessa ges and warning/indicator lamps 471
Page 475 of 557
Display messages
Possible causes/consequences and M
MSolutions
Ø Refill AdBlue No start in
XXX mi *
The AdBlue ®
leve l is only suf ficient forth e displa yed dis tance. #
Refill Ad Blue ®
immediately .
% The message disappea rsafte r driving at a speed abo ve15 km/h for appro ximately one minu te.
# Start engine See Owner's
Manual *T
he engine is off and the battery charge leve l is too lo w. #
Switch off electrical consumers that are not required. #
Lea vethe engine running for a few minutes, or drive for a longer dis tance.
The battery charge s.
!
Clean the fuel filter *
Ve hicles with a diesel engine: thewate r inthe fuel filter must be drained off. #
Consult a qualified specialist workshop. 472
Displaymessa ges and warning/indicator lamps
Page 481 of 557
Display messages
Possible causes/consequences and M
MSolutions
, Replace key See Owner's
Manual *
Ve hicles with a digital vehicle key in the sma rtphone: only afew or no authorisations remain forst arting the
engine. #
Make sure that the Internet connection is not limited bycer tain mobile phone settings. #
Open the Mercedes me connect web App http://www.mercedes.me. and call up the "digital vehicle key in the
smartphone" service. #
Deactivate the service firs t and then activate it again. #
Ifth e display message still appears, con tact the Mercedes-Benz Cus tomer Assis tance Center (C AC).
 Change key batteries *T
hekey bat tery is dischar ged. #
Change the battery .
Â
Key not detected (white
display message) *T
hekey is cur rently und etected. #
Change the location of theke y in theve hicle. #
Ifth eke y is still not recognised, start the engine with theke y in thestow age compartment . 478
Displaymessa ges and warning/indicator lamps
Page 482 of 557
Display messages
Possible causes/consequences and M
MSolutions
 Place the key in the
marked space See Owner's
Manual *T
hekey de tection function is malfunctioning. #
Change the location of theke y in theve hicle. #
Start theve hicle with theke y in thestow age compartment .
Â
Key not detected (red dis‐
play message) *T
hekey cannot be de tected and may no longer be in theve hicle.
The key is no lon ger in theve hicle and you swit choff the engine:
R You can no lon gerst art the engine.
R You cannot centrally lock theve hicle. #
Ensure that theke y is in theve hicle.
If th eke y de tection function has a malfunction due toast ro ng radio signal source: #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. #
Place theke y in thestow age compartment forst arting the engine with theke y . Display messages and
warning/indicator lamps 47 9
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Display messages
Possible causes/consequences and M
MSolutions
j Check trailer hitch lock *T
he trailer hitch is not operational. &
WARNING Risk of an accident if the ball neck is not loc ked
If th e ball neck is not in the loc ked position, the trailer may come loose. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions.
Do not continue driving under any circums tances. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivelling procedure and do not re-couple the trailer until the display message disappears. #
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. #
Uncouple the trailer and safeguard it against rolling away. #
Initiate a new swivelling procedure . #
When the display message disappears, couple up the trailer and drive on.
If th e display message does not disappear, the trailer hitch is defective and the ball neck is not loc ked. #
Do not couple up the trailer. Drive on without the trailer. Pay attention tothere duced ground clearance due to
th e unloc ked ball nec k. #
Consult a qualified specialist workshop.
Apply brake to deselect
Park (P) position *
Yo u ha veattem ptedto shift the transmission out of position jand into ano ther transmission position. #
Depress the brake pedal. Display messages and
warning/indicator lamps 481
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Display messages
Possible causes/consequences and M
MSolutions
To shift out of P or N,
depress brake and start
engine *
Yo u ha veattem ptedto shift the transmission out of position jori into ano ther transmission position. #
Depress the brake pedal. #
Start the engine.
Risk of vehicle rolling
Driver door open and trans-
mission not in P *
The driver's door is not fully closed and the transmission is in position k,iorh. #
Shift the transmission toposition jwhen you park theve hicle.
N permanently active Risk
of vehicle rolling *
While theve hicle is rolling or while you are driving, the transmission has been shif tedto position i. #
Depress the brake pedal tostop and, when theve hicle is stationar y,shift the transmission toposition j. #
Tocontinue your journe y,shift the transmission toposition hork.
Only select Park (P) when
vehicle is stationary *
The transmission can only be shif tedto position jwhen theve hicle is stationar y.
Without changing gear,
consult workshop *T
he transmission is malfunctioning. The transmission position can no longer be shif ted. #
When the transmission is in position h, consult aqualified specialist workshop and do not shift the transmis‐
sion position. #
For all other transmission positions, park theve hicle safely. #
Consult a qualified specialist workshop. 482
Display messages and warning/indicator lamps
Page 486 of 557

Display messages
Possible causes/consequences and M
MSolutions
d Vehicle is operational
Switch off the ignition
before exiting *Y
ou are leaving theve hicle when it is in a ready-to-drive state. #
When you lea vetheve hicle, switch off the ignition and take theke y with you. #
Ifyo u do not lea vetheve hicle, switch off the electrical consumers, e.g. the seat heater. Otherwise, the12 ‑volt
battery might discha rge and it will then only be possible tostart theve hicle using a donor battery (s tarting
assis tance).
Transmission Malfunction
Stop *
The transmission is malfunctioning. The transmission shi fts to position iautomaticall y. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. #
Switch the transmission toposition j. #
Consult a qualified specialist workshop.
Reversing not poss. Con-
sult workshop *T
he transmission is malfunctioning. Reversege ar can no lon ger be engaged. #
Consult a qualified specialist workshop.
Stop vehicle Leave engine
running Wait Transmission
cooling *T
he transmission has overheated. Pulling away can be temp orarily impaired or not possible. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances. #
Start the engine. #
Wait until the display message disappears before pulling away. Displ
aymessa ges and warning/indicator lamps 483
Page 487 of 557

Display messages
Possible causes/consequences and M
MSolutions
Auxiliary battery malfunc-
tion *T
he auxiliary batteryforth e transmission is no longer being charge d. #
Consult a qualified specialist workshop. #
Untilthen, manually set the transmission toposition jbefore you swit choff the engine. #
Before leaving theve hicle, apply the electric parking brake.
Depress clutch fully to
start engine *Y
ou ha veattem ptedto start the engine without depressing the clutch pedal. #
Depress the clutch pedal and then start the engine.
The engine has stalled while pulling away, e.g. because the clutch pedal wasre leased tooqu ickl y. #
Dep ress the clutch pedal again.
The engine starts automaticall y. #
Slowly release the clutch pedal topull away.
Clutch overheated Avoid
pulling away for XX:XX mins *T
he clutch is under considerable load and is overheating.
Av oid frequent pulling away and driving at walking pace over longer dis tances. #
Stop theve hicle, paying attention toroad and traf fic conditions and le avethe engine running.
The clutch is cooled more quickly when the engine is running.
or #
If possible, continue driving at a steady speed and remo veyour foot from the clutch pedal. Do not ride the
clutch.
The clutch is cooled while driving.
When the clutch has cooled down, the display message disappears. 484
Display messages and warning/indicator lamps