MERCEDES-BENZ C-CLASS SALOON 2018 Owners Manual

Display messages
Possible causes/consequences and 0050
0050Solutions 000A
WARNING Risk of accident if steering capability is impaired
If th esteering does not function as intended, theve hicle's operating saf ety is jeopardised. 0007
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. 0007
Consult a qualified specialist workshop. 0007
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. 0007
Consult a qualified specialist workshop. Ty
res Display messages
Possible causes/consequences and 0050
0050Solutions
Tyre pressure Check tyres *T
he tyre pressure loss warning sy stem has de tected a significant loss in pressure. 000A
WARNING Risk of an accident due toinsuf ficient tyre pressure
Ty res with insuf ficient tyre pressure pose thefo llowing risks:
R The tyres may bur st, especially as the load and vehicle speed increase. 528
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
R The tyres may wearexcessively and/or une venly, which may greatly impair tyre traction.
R ‑ The driving characteristics, steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. 0007
Obser vethere commended tyre pressures. 0007
Adjust the tyre pressure if necessar y. 0007
Stop theve hicle, paying attention toroad and traf fic conditions. 0007
Check the tyre pressure (0013 page449) and the tyres. 0007
When the tyre pressure is cor rect, restart the tyre pressure loss warning sy stem (0013 page 457).
0077 Warning tyre defect *T
he tyre pressure in one or more tyres has dropped suddenly. The wheel position is displa yed. 000A
WARNING Risk of an accident from driving wi thaflat tyre
Flat tyres are dangerous in thefo llowing ways:
R The tyres can overheat and cause a fire.
R ‑ The driving characteristics, steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. 0007
Do not drive with a flat tyre. 0007
Obse rveth e no tes on flat tyres. Display messages and
warning/indicator lamps 529

Display messages
Possible causes/consequences and 0050
0050Solutions
No tes on flat tyres (0013 page 427). 0007
Stop theve hicle, paying attention toroad and traf fic conditions. 0007
Check the tyres.
0077 Check tyre(s) *T
he tyre pressure in one or more tyres has dropped significantl y.The wheel position is displa yed. 000A
WARNING Risk of an accident due toinsuf ficient tyre pressure
Ty res with insuf ficient tyre pressure pose thefo llowing risks:
R The tyres may bur st, especially as the load and vehicle speed increase.
R The tyres may wearexc essively and/or une venly, which may greatly impair tyre traction.
R ‑ The driving characteristics, steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. 0007
Obser vethere commended tyre pressures. 0007
Adjust the tyre pressure if necessar y. 0007
Stop theve hicle, paying attention toroad and traf fic conditions. 0007
Check the tyre pressure (0013 page449) and the tyres.
0077 *T
he tyre pressure is too low in at least one of the tyres, or the tyre pressure dif fere nce between the wheels is too
great. 0007
Check the tyre pressure and add air, if necessar y.530
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
Rectify tyre pressure 0007
When the tyre pressure is cor rect, restart the tyre pressure monitoring sy stem (0013 page 452).
0077 Tyre press. monitor cur-
rently unavailable *T
here is inter fere nce from a po werful radio signal source. As a result, no signals from the tyre pressure sensors are
re cei ved. The tyre pressure monitoring sy stem is temp orarily una vailable. 0007
Drive on.
The tyre pressure monitoring sy stem restarts automatically as soon as the cause has been rectified.
0077
Wheel sensor(s) missing *T
he tyre pressure sensor signal is missing from one or more tyre(s). The pressure of the af fected tyre is not dis‐
pl ay ed. 0007
Have thefa ulty tyre pressure sensor replaced at a qualified specialist workshop.
0077 Tyre press. monitor inoper-
ative No wheel sensors *T
he wheels fitted do not ha vesuitable tyre pressure sensors. The tyre pressure monitoring sy stem is deactivated. 0007
Fit wheels with suitable tyre pressure sensors.
0077 *T
he tyre pressure monitoring sy stem is faulty. Display messages and
warning/indicator lamps 531

Display messages
Possible causes/consequences and 0050
0050Solutions
Tyre press. monitor inoper-
ative 000A
WARNING Thereis a risk of an accident if the tyre pressure monitoring sy stem is malfunctioning
If th e tyre pressure monitoring sy stem is malfunctioning, it is not able toissue a warning if there is pressure
loss in one or more of the tyres.
Ty res with insuf ficient tyre pressure ma y,forex ample, af fect theve hicle's handling characteristics, steering and
braking. ‑ 0007
Have the tyre pressure monitoring sy stem checked at a qualified specialist workshop. 0007
Consult a qualified specialist workshop.
Tyre(s) overheated *A
t least one tyre is overheating. The af fected tyres are displ ayed in red. At temp eratures close tothe limit value,
th e tyres are displa yed in yello w. 0007
Drive more sl owly.
Reduce speed *A
t least one tyre is overheating. The af fected tyres are displ ayed in red. At temp eratures close tothe limit value,
th e tyres are displa yed in yello w. 000A
WARNING Risk of an accident from driving wi thove rheated tyres
Overheated tyres may bur st, particularly at high speeds. 0007
Reduce speed so that the tyres cool down. 0007
Reduce speed so that the tyres cool down.
*T he tyre pressure loss warning sy stem generated a displ aymessa geand has not been restar ted since. 532
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
Check tyre pressures then
restart Run Flat Indicator 0007
When the tyre pressure is cor rect, restart the tyre pressure loss warning sy stem (0013 page 457).
Run Flat Indicator inopera-
tive *T
he tyre pressure loss warning sy stem is malfunctioning. 0007
Consult a qualified specialist workshop. Key
Display messages
Possible causes/consequences and 0050 0050Solutions
00AF 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. 0007
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: 0007
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. 0007
Place theke y in the slot forst arting the engine with theke y (0013 page169). Displ
aymessa ges and warning/indicator lamps 533

Display messages
Possible causes/consequences and 0050
0050Solutions
00AF Replace key *T
hekey needs tobe replaced. 0007
Consult a qualified specialist workshop.
00AF Key not detected (white
display message) *T
hekey is cur rently und etected. 0007
Change the location of theke y in theve hicle. 0007
Ifth eke y is still not recognised, start the engine with theke y in the slot (0013 page169).
00AF Change key batteries *T
hekey bat tery is dischar ged. 0007
Replace the battery (0013 page75).
00AF
Place the key in the
marked space See Owner's
Manual *T
hekey de tection function is malfunctioning. 0007
Change the location of theke y in theve hicle. 0007
Start theve hicle with theke y in the slot (0013 page169). 534
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
, Replace key See Owner's
Manual *
Ve hicles with a digital vehicle key:only a few or no authorisations remain forst arting the engine. 0007
Make sure that the internet connection is not limited bycer tain mobile phone settings. 0007
Open the Mercedes me connect http://www.mercedes.me and call up the digital vehicle key service. 0007
Deactivate the service firs t and then activate it again. 0007
Ifth e display message still appears, con tact the Mercedes-Benz Cus tomer Assis tance Center (C AC).
Ve hicles with a digital vehicle keyst icke r:on lyafe w or no authorisations remain forst arting the engine. 0007
Order a new digital vehicle keyst icke r from a Mercedes-Benz Service Centre or at http://www.mercedes-
benz.com/connect. Ve
hicle Display messages
Possible causes/consequences and 0050 0050Solutions
00CA Trailer coupling extending… *E
xtending or retracting the ball nec k.
Do not attem pttospeed up, slow down or initiate there tracting or extending process using your hand, foot or other
aids. During there tracting or extending process, do not couple a traile r.
When the ball neck has reached an operational position, the display message disappears.
00CA *
Yo u ha veattem pted todisplace the ball neck and the transmission is in position 005E,005Cor005B. 0007
Depress the brake pedal. 0007
Shift the transmission toposition 005D. Display messages and
warning/indicator lamps 535

Display messages
Possible causes/consequences and 0050
0050Solutions
Operation only possible in
transmission position P
00CA
Operation only possible in
transmission position N *
Ve hicles with manual transmission: you attem ptedto swivel the ball neck and the transmission is not in neutral
005C. 0007
Shift the transmission toneutral 005C.
00CA Check trailer hitch lock
(whi tedisplay message) *T
he trailer tow hit chis not operational when you are driving with a trailer. 0007
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. 0007
Uncouple the trailer and secure it against rolling away. 0007
Initiate a new swivelling procedure (0013 page 262). 0007
Ifth e ball neck is extended, press and hold the button on the boot lid until the ball neck engages beneath the
bumper. 0007
When the display message disappears, couple up the trailer and drive on. 000A
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. 0007
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. 536
Display messa ges and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions 0007
Uncouple the trailer and secure it against rolling away. 0007
Initiate a new swivelling procedure and do not re-couple the trailer until the display message disappears. If
th e display message does not disappear, the trailer tow hit chis defective and the ball neck is not loc ked. 0007
Do not couple up the trailer. Drive on without the trailer. No tethere duced ground clearance due tothe
unlo cked ball nec k. 0007
Consult a qualified specialist workshop.
The trailer tow hit chis not operational when theve hicle is at a standstill. 0007
Uncouple the coupled trailer and secure it against rolling away. 0007
Initiate a new swivelling procedure (0013 page 262). 0007
Ifth e ball neck is retracted: press and hold the button on the boot lid until the ball neck engages vertically in
th e loc ked position and then engages beneath the bumper. 0007
Ifth e ball neck is extended: press and hold the button on the boot lid until the ball neck engages beneath the
bumper.
If th e display message does not disappear, the trailer tow hit chis defective and the ball coupling is not loc ked. 0007
Do not couple up the trailer. Drive on without the trailer. No tethere duced ground clearance due tothe
unlo cked ball nec k. 0007
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 537