Engine
Warning/
indicator
lampNSignaltype
Possible causes/consequences and M
Solutions
;NThe yellow CheckE nginew arning lamp lightsupw hile theengine is running.
Therem ay beamalfunction, for example:
Rin th eengine management
Rin th efuel injection system
Rin th eexhaust system
Rin th eignition system
Rin th efuel system
The emission limit values may be exceeded and th eengine may be in emergency
mode.
XVisitaq ualified specialist workshop immediately.
In somes tates, you must immediately visi taqualified specialist workshop as soon
as th eyellow CheckE nginew arning lamp lightsu p. This is due to thelegal require-
ments in effect in these states. If in doubt,c heck whether suchl egal regulations
apply in th estate in whichy ou are currently driving.
8NThe yellow reservef uel warning lamp lightsupw hile theengine is running.
The fuel leve lhas dropped int othe reserver ange.
XRefuel at th enearest gas station.
8NThe yellow reservef uel warning lamp flashes while th evehicle is in motion.
In addition,t he; CheckE nginew arning lamp may light up.
The fuel fille rcap is no tclosed correctly or th efuel system is leaking.
XCheckt hatthe fuel fille rcap is correctly closed.
XIf th efuelfiller cap is not correctly closed: close thefuel fille rcap.
XIf th efuelfiller cap is closed: visitaq ualified specialist workshop.
?NThe red coolant warning lamp lightsupw hile theengine is runnin gand the
coolant temperatur egauge is at th estart of th escale.
The temperatur esensor for th ecoolant temperatur egauge is malfunctioning.
The coolant temperatur eisnolonger beingm onitored. Thereisar isk of engine
damag eifthecoolant temperatur eistoohigh.
XPull ove rand stop th evehicle safely and switch off th eengine ,payinga ttention
to road and traffic conditions. Do no tcontinue driving unde rany circumstances.
XSecure th evehicle against rolling away (Ypage 131).
XConsult aqualified specialist workshop.
Warning and indicator lamps207
On-boardc omputer and displays
Z
amessage appearsint hemultifunction display
prompting you to add washer fluid (Ypage 201).
Further informatio nonwindshield washer fluid/
antifreeze(
Ypage 294).
Overview of th eengine compartment
Example :gasoline engine
:
Engineo il cap
;Oil dipstick
=Brake fluid reservoir
?Washerf luid reservoir
ACoolante xpansion tank
ASSYST PLUS
Service messages
The ASSYS TPLUSs erviceinterval display
inform syou of th enexts ervic edue date.
Information on th etype of servic eand service
intervals (see th eseparate Maintenance Book-
let).
You can obtain further informatio nfroma n
authorized Mercedes-Ben zCenter or at
http://www.mbusa.com (USAo nly).
iThe ASSYS TPLUSs erviceinterval display
does no tshow any informatio nontheengine
oil level. Observ ethe note sont heengine oil
level(
Ypage 234).
The multifunction display showsas ervicemes-
sage for several seconds, e.g.:
RServiceAin..D ays
RServiceADue
RServiceAExceeded by .. Days
Dependingont heoperatin gconditionsoft he
vehicle ,the remainin gtimeord istanc euntil the
nex tservic edue dateisd isplayed.
The letter A
orB,possibly in connectio nwith a
number or another letter, showst hetype of ser-
vice. A
stands for aminor servic eand Bfor a
major service.
You can obtain further informatio nfroma n
authorized Mercedes-Ben zCenter.
The ASSYS TPLUSs erviceinterval display does
no ttak eintoa ccounta ny periods of tim eduring
whicht hebattery is disconnected.
Maintaining th etime-dependents ervicesched-
ule:
XNoted own th eservic edue dated isplayedin
th em ultifunction display before disconnect-
ing th ebattery.
or
XAfte rreconnectin gthe battery, subtrac tthe
battery disconnectio nperiods from th eser-
vic ed ates hownont hedisplay.
Hiding aservice message
XPres sthe a or% button on th esteering
wheel.
Displaying service messages
XSwitch on th eignition.
XPres sthe = or; button on th esteering
wheel to selectt heServ.menu.
XPres sthe 9 or: button to selectt he
ASSYSTPLUSsubmenu and confir mbypress-
ing the abutton.
The servic edue datea ppearsint hemulti-
function display.
Information abou tService
Resettin gthe ASSYST PLUS service
interval display
!If th eASSYSTP LUSs erviceinterval display
has been inadvertently reset,t hiss ettin gcan
be correcte dataqualified specialist work-
shop.
Hav eservic ework carried out as describe din
th eM aintenance Booklet. This may otherwise
ASSYST PLUS237
Maintenance and care
Z
