2017 MERCEDES-BENZ S-Class COUPE ECU

Display messagesPossible causes/consequences and0050Solutions
Auxiliary BatteryMalfunctionThe auxiliary battery for th etransmission is no longer bein gcharged.
XVisit aqualified specialist workshop .
XUntilthen ,set th etransmission to position Pbefore you switch off
th eengine.
XBefor eleaving th evehicle, apply th eelectric parking brake.
0084The trunk lid is open .
XCloseth etrunk lid.
0083The hoo dis open . Awarning tone also sounds.
GWARNIN G
The open hoo dmay bloc kyour vie wwhen th evehicl eis in motion .
There is aris kof an accident.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 137).
XCloseth ehood.
0051At least on edoor is open . Awarning tone also sounds.
XClos eall th edoors.
006F
Loc kSea tBackrestFront Lef torFrontRightSea tBackrestNot Locked
The driver's or fron tpassenger's seat backrest is no tengaged. A
warning tone also sounds.
XPush th ebackrest bac kuntil it engages.
00CC
Power Steering Mal ‐function See Opera‐tor's Manual
The powersteering is malfunctioning .
A warning tone also sounds.
GWARNIN G
You will need to use mor eforce to steer .
There is aris kof an accident.
XChec kwhether you are able to apply th eextr aforce required.
If you ar eabl eto steer safely:
XDrive on carefully.
XVisit aqualified specialist workshop immediately.
If you ar eunable to steer safely:
XDo no tdrive on .
XConsult aqualified specialist workshop .
Display messages229
On-board computer and displays
Z

Display messagesPossible causes/consequences and0050Solutions
00AF
Key Not Detected(reddisplay message )
The SmartKey is no tin th evehicle.
A warning tone also sounds.
If th eengin eis switched off ,you can no longer loc kth evehicl ecen-
trally or start th eengine.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 137).
XLocate th eSmartKey.
XPress 0076on thesteering whee lto confirm th edisplay message .
Becausethere is interferenc efrom astron gsource of radi owaves, th e
SmartKey is no tdetecte dwhils tth eengin eis running.
A warning tone also sounds.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 137).
XInsertth eSmartKey int oth eignition loc kand bring int oke ymode.
00AF
Remove 'Start 'But ‐ton and Insert Key
The SmartKey is continually undetected.
The SmartKey detection function has atemporar ymalfunction or is
faulty. Awarning tone also sounds.
XInser tth eSmartKey int oth eignition loc kand tur nit to th edesire d
position .
XVisitaqualified specialist workshop .
Warning and indicat orlamps in the instrume nt cluster
General notes
Some systems carry out aself-diagnosis when th eignition is switched on .Therefore ,som eindicator
and warning lamp smay ligh tup or flas htemporarily. This behavio ris non-critical .These indicator
and warning lamp sonly indicat e amalfunction if they ligh tup or flas hafter starting th eengin eor
whils tdriving.
Warning and indicator lamps in the instrument cluster231
On-board computer and displays
Z

Safety
Seat belts
Warning/
indicator
lamp0051Signal type
Possible causes/consequences and 0050
Solutions
00E90051After starting the engine, the red seat belt warning lamp lights up for 6 seconds.
The seat belt warning lamp reminds the driver and front passenger to fasten their
seat belts.
XFasten your seat belt (Ypage 44).
00E90051 After starting the engine, the red seat belt warning lamp lights up. In addition, a
warning tone sounds for up to 6 seconds.
The driver's seat belt is not fastened.
XFasten your seat belt (Ypage 44).
The warning tone ceases.
00E90051 The red seat belt warning lamp lights up after the engine starts, as soon as the
driver's or the front-passenger door is closed.
The driver or front passenger has not fastened their seat belt.
XFasten your seat belt (Ypage 44).
The warning lamp goes out.
There are objects on the front-passenger seat.
XRemove the objects from the front-passenger seat and stow them in a secure
place.
The warning lamp goes out.
00E90051 The red seat belt warning lamp flashes and an intermittent audible warning
sounds.
The driver or front passenger has not fastened their seat belt. The vehicle is being driven faster than 15 mph (25 km/h) or has briefly been driven faster than 15 mph
(25 km/h).
XFasten your seat belt (Ypage 44).
The warning lamp goes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. The vehicle is being driven faster
than 15 mph (25 km/h) or has briefly been driven faster than 15 mph (25 km/h).
XRemove the objects from the front-passenger seat and stow them in a secure
place.
The warning lamp goes out and the intermittent warning tone ceases.
232Warning and indicator lamps in the instrument cluster
On-board computer and displays

Safety systems
Warning/
indicator
lamp0051Signal type
Possible causes/consequences and 0050
Solutions
0027004D00510027 (USA only) or 004D(Canada only): the red brake system warning lamp is
lit while the engine is running.
A warning tone also sounds.
GWARNING
The brake boosting effect is malfunctioning and the braking characteristics may be
affected.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehicle against rolling away (Ypage 137).
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction display.
0027004D0051 0027 (USA only) or 004D(Canada only): the red brake system warning lamp is
lit while the engine is running.
A warning tone also sounds.
There is not enough brake fluid in the brake fluid reservoir.
GWARNING
The braking effect may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehicle against rolling away (Ypage 137).
XDo not add brake fluid. Adding more will not correct the malfunction.
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction display.
00270051 USA only: the red brake system warning lamp is lit while the engine is running.
The multifunction display also shows a display message with the 0026symbol.
The brake pads/linings have reached their wear limit.
XVisit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster233
On-board computer and displays
Z

Engine
Warning/
indicator
lamp0051Signal type
Possible causes/consequences and 0050
Solutions
00B90051The yellow Check Engine warning lamp lights up while the engine is running.
There may be a malfunction, for example:
Rin the engine management
Rin the fuel injection system
Rin the exhaust system
Rin the ignition system
Rin the fuel system
The emission limit values may be exceeded and the engine may be in emergency
mode.
XVisit a qualified specialist workshop immediately.
iIn some states, you must immediately visit a qualified specialist workshop as
soon as the yellow Check Engine warning lamp lights up. This is due to the legal
requirements in effect in these states. If in doubt, check whether such legal
regulations apply in the state in which you are currently driving.
00B60051 The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.
00B60051 The yellow reserve fuel warning lamp flashes while the vehicle is in motion.
In addition, the 00B9Check Engine warning lamp may light up.
The fuel filler cap is not closed correctly or the fuel system is leaking.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed: close the fuel filler cap.
XIf the fuel filler cap is closed:visit a qualified specialist workshop.
00AC0051The red coolant warning lamp comes on while the engine is running. The coolant
temperature gauge is at the beginning of the cold range.
The temperature sensor for the coolant temperature gauge is malfunctioning.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehicle against rolling away (Ypage 137).
XConsult a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster237
On-board computer and displays
Z

Warning/
indicator
lamp0051Signal type
Possible causes/consequences and 0050
Solutions
00AC0051The red coolant warning lamp comes on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be defective.
The coolant is too hot and the engine is no longer being cooled sufficiently.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 137).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 277).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
XDo not start the engine again until the coolant temperature is below 257 ‡
(125 †). Otherwise, the engine could be damaged.
XDrive to the nearest qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
00AC0051 The red coolant warning lamp comes on while the engine is running. A warning
tone also sounds.
The coolant temperature has exceeded 255 ‡(124 †). The airflow to the engine
radiator may be blocked or the coolant level may be too low.
GWARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can occur
just by opening the hood.
There is a risk of injury.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 137).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 277).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
238Warning and indicator lamps in the instrument cluster
On-board computer and displays

Tires
Warning/
indicator
lamp0051Signal type
Possible causes/consequences and 0050
Solutions
00770051The yellow combination low tire pressure telltale/TPMS malfunction telltale for
the TPMS (pressure loss or malfunction) is lit.
The tire pressure monitor has detected a loss of pressure in at least one of the tires.
GWARNING
Tire pressures that are too low pose the following hazards:
Rthey may burst, especially as the load and vehicle speed increase.
Rthey may wear excessively and/or unevenly, which may greatly impair tire trac-
tion.
Rthe driving characteristics, as well as steering and braking, may be greatly
impaired.
There is a risk of an accident.
XStop the vehicle without making any sudden steering or braking maneuvers. Pay
attention to the traffic conditions as you do so.
XSecure the vehicle against rolling away (Ypage 137).
XObserve the additional display messages in the multifunction display.
XCheck the tires and, if necessary, follow the instructions for a flat tire
(Ypage 288).
XCheck the tire pressure (Ypage 309).
XIf necessary, correct the tire pressure.
00770051 The yellow combination low tire pressure telltale/TPMS malfunction telltale for
the TPMS (pressure loss or malfunction) flashes for approximately one minute and
then remains lit.
The tire pressure monitor is faulty.
GWARNING
The system is possibly unable to recognize or register low tire pressure.
There is a risk of an accident.
XObserve the additional display messages in the multifunction display.
XVisit a qualified specialist workshop immediately.
240Warning and indicator lamps in the instrument cluster
On-board computer and displays

Connecting a mobile phone
Requirements
For telephony via the Bluetooth®interface, you
require a Bluetooth®-capable mobile phone. The
mobile phone must support Hands-Free Profile
1.0 or above. You can also connect your mobile phone via NFC (N earField Communication) with
the multimedia system. For more information
(see the Digital Operator's Manual).
Multimedia system:
XSelect Vehicle007BSystem Set‐tings007BActivate Bluetooth.
XActivate Bluetooth®0073.
Mobile phone:
XActivate Bluetooth®and, if necessary, Blue-
tooth®visibility for other devices (see the
manufacturer's operating instructions).
The Bluetooth
®device names for all of one man-
ufacturer's products might be identical. To
make it possible to clearly identify your mobile
phone, change the device name (see the man-
ufacturer's operating instructions).
If the mobile phone supports the PBAP (Phone
B ook Access Profile) and MAP (M essage
Access Profile) Bluetooth
®profiles, the follow-
ing information will be transmitted after you
connect:
RPhone book
RCall lists
RMessages
iFurther information on suitable mobile
phones can be found at: http://
www.mercedes-benz.com/connect
iIn the USA, you can get in touch with the
Mercedes-Benz Customer Assistance Center
on 1-800-FOR-MERCedes (1-800-367-6372 ).
In Canada, you can get in touch with the Cus-
tomer Relations Center on 1-800-387-0100.
Searching for and authorizing a mobile
phone
Before using your mobile phone without NFC
with the multimedia system, you will need to
search for the phone and then authorize it.
Depending on the mobile phone, authorization
either takes place by means of Secure Simple Pairing or by entering a passkey. The multimedia
system automatically makes the procedure that
is relevant for your mobile phone available. The
mobile phone is always connected automati-
cally after authorization. Further information on
using a mobile phone with the multimedia sys-
tem (see the Digital Operator's Manual).
If the multimedia system does not detect your
mobile phone, this may be due to particular
security settings on your mobile phone (see the
manufacturer's operating instructions).
Only one mobile phone can be connected to the
multimedia system at any one time.
Searching for a mobile phone
Multimedia system:
XSelect
Phone007BConnect Device.
XSelectSearch for Phones.
XSelectStart Search.
The available mobile phones are displayed in
the device list.
Symbols in the device list
Sym-
bolExplanation
00D3New mobile phone found, not yet
authorized.
00DCMobile phone is authorized, but is
not connected
0036Mobile phone is authorized and
connected
Connecting a mobile phone
Authorization using Secure Simple Pairing:
XSelect mobile phone.
A code is displayed in the multimedia system
and on the mobile phone.
XIf codes match: selectYeson the multimedia
system.
XConfirm code on the mobile phone. Depend-
ing on the mobile phone used, confirm the
connection to the multimedia system and for
the PBAP and MAP Bluetooth
®profiles. The
prompt to confirm may take up to two
minutes to be displayed (see the manufactur-
er's operating instructions).
XIf the codes are different: selectNoon the
multimedia system.
The process is canceled.
Repeat authorization.
250Operating system
Multimedia system