check engine MERCEDES-BENZ SL ROADSTER 2008 User Guide

Displa
ymessages 219Display messages Possible cause/consequence Possible solution
D Coolan
tStopc ar,
turn engine off. Th
ec oolant is too hot. X
Stop the vehicle. Pa yattention to the traffic
conditions as yo udoso.
X Switc hoff the engine.
X Make sure ,tha tthe ai rsuppl ytot he radiator
is not blocked, e.g .bys lush.
X Wait until the messag edisappear sbefore
restarting the engine .There is otherwise arisk
of engine damage.
X Observe the coolant temperature gauge.
X If the temperature increases again, visi taquali-
fied specialis tworksho pimmediately. D Coolan
tStopc ar,
turn engine off. Th
ep oly-V -beltmayhave torn. X
Stop the vehicle. Pa yattention to the traffic
conditions as yo udoso.
X Switc hoff the engine.
X Check the poly-V-belt.
X If it has torn: do not driveon. Contact the
nearest qualifie dspecialis tworkshop.
X If it is no tdamaged: do not start the engine
agai nuntil the messag edisappear s. Thereis
otherwise ariskofe ngine damage. Practical advi
ce
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Displa
ymessages 224 Display messages Possible cause/consequence Possible solution
. Reversin
glamp
left
or
Reversin glamp
right Th
eleft-han dorright-hand reversing lamp
is faulty. X
Replac ethe bulb (Y page 259). . Tail lamp left
Back-u
pbulbon
or
Tail lamp right
Back-u pbulbon Th
eleft-han dorr ight-hand tai llam pis
faulty. X
Visi taq ualified specialis tworkshop. N Clos
ecentr ecom-
partment Th
es towage compartment unde rthe arm-
rest is open. Th einterior motio nsensor*
is inoperative. X
Clos ethe stowage compartment unde rthe
armrest (Y page 162). N Engine oi
llevel
Chec klevel Vehicles with an oi
ldipst ick: the engine oil
leve lhas droppe dtoac ritical level. X
Check the engine oi llevel ( Ypage 178) an dtop
up the engine oi lifnecessary.
X Have the engine checked for leak sifthe engine
oi ln eeds topping up more often tha nusual. N Ad
d1l itre engine
oi lw henn extr efu-
elling Vehicles without an oi
ldipst ick: the
engine oi llevel is too low. X
Check the engine oi llevel ( Ypage 178) an dtop
up the engine oi lifnecessary.
X Have the engine checked for leak sifthe engine
oi ln eeds topping up more often tha nusual. Practical advi
ce
*optional
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Displa
ymessages 225Display messages Possible cause/consequence Possible solution
N Engine oi
llevel
Stop car, turn
engine off. Vehicles without
adipst ick: there is not
enoug hoilin the engine .There isad anger
of engine damage. X
Stop the vehicle. Pa yattention to the traffic
conditions as yo udoso.
X Switc hoff the engine.
X To pupt he engine oi land check the level
(Y page 178). N Engine oi
llevel
Reduce oi llevel Vehicles without an oi
ldipst ick: yo uhave
adde dtoo much engine oil. Ther eisarisk
of damaging the engine or catalytic con-
verter. X
Sipho noff exces sengine oi luntil it is at the
specified level. Observe the lega lrequire-
ments. N Engine oi
llevel
Engine oi llevel
cannot be measured Vehicles without an oi
ldipst ick: the meas-
uring syste misfaulty. X
Visi taq ualified specialis tworkshop. ± Consul
tworkshop One or mor
eelectroni csystems are
unable to delive rinformation to the on-
boar dcomputer .The coolant temperature
gaug eand the re vcounter ma yhave
failed. X
Visi taq ualified specialis tworkshop. H Tyre pressure Cau-
tion tyre defect
G
Ris
kofa ccident
At leas tone tyre is rapidl ydefla ting. The
affected whee lishighlight ed in the tyre
pressure displa yofthe tyre pressure mon-
itor*. X
Stop the vehicl ewithout makin ganysudden
steering or braking manoeuvres. Pa yattention
to the traffi cconditions as yo udoso.
X Repair or change the tyre (Y page 266). Practical advi
ce
*o ptional
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Displa
ymessages 226 Display messages Possible cause/consequence Possible solution
H Tyre pressure
Chec
ktyres G
Ris
kofa ccident
Th ep ressur einone or mor etyres has
droppe dsignificantly .The affected wheel
is highlighted in the tyre pressure display
of the tyre pressure monitor*. X
Stop the vehicl ewithout makin ganysudden
steering or braking manoeuvres. Pa yattention
to the traffi cconditions as yo udoso.
X Check the tyres.
X Repair or change the faulty tyre if necessary
(Y page 266).
X Check the tyre pressure an dcorrect it if nec-
essary (Y page 184).
Th ew arning will disappea rautomaticall yafter
yo uh aveb eend rivin gfor afew minutes with
the corrected tyre pressure. H Please correc
tthe
tyre pressure Vehicles with
atyrep ressur emonitor*:
the pressure of at leas tone tyre is too low
or there is asignificant discrepancy
between the tyre pressure softhe individ-
ua lw heels. X
Check the tyre pressure at the next opportunity
an dc orrect it if necessar y(Ypage 184). I Change ke
ybatter-
ies Th
eK EYLESS GO *key batterie saredis-
charged. X
Change the batterie s(Ypage 259). I Ke
yn ot detected Th
eK EYLESS GO *key is not in the vehicle.
If the engine is switche doff,t he vehicle
ca nnol ongerbel ocked centrall yand the
engine cannot be started. X
Stop the vehicle. Pa yattention to the traffic
conditions as yo udoso.
X Look for the KEYLESS GO *key. Practical advice
*optional
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Troubleshooting
236 Problem Possible cause/consequence Suggeste
dsolutions D
Ther ed coolant warning
lamp comes on whil ethe
engine is running. Th
ec oolant level is too low.
Th ec oolant is too ho tand the
engine is no longe rbeing cooled
sufficiently. X
Stop the vehicle. Pa yattentio ntotrafficconditions as yo udoso.
X Allow the engine and coolant to cool.
X Check the coolant level (Y page 180).Obser ve the warning notes.
To pupt he coolant if necessary.
X Have the coolant syste mchecked at aqualified specialis twork-
sho pift he coolant needs topping up mor eoftenthanu sual. D
Ther ed coolant warning
lamp comes on whil ethe
engine is running. If the coolant level is correct, the
airflow to the radiato
rmaybe
blocke dorthe radiato rfan may
be malfunctioning.
Th ec oolant is too ho tand the
engine is no longe rbeing cooled
sufficiently. X
Make sure tha tthe airflow to the radiato risnot blocked, e.g .by
snow, slus horice.
X If the coolant temperatur eislesst han1 20† ,you can continue
driving to the neares tqualified specialis tworkshop.
X Avoi dheavy loadsont he engine (e.g. driving in mountainou ster-
rain) and stop-and-g odriving. D
Ther ed coolant warning
lamp comes on whil ethe
engine is running .You will
also hear awarning tone. Th
ec oolant level is too low.
Th ec oolant temperatur ehas
exceeded 120 †. Th eengine is
not being coole dsufficiently and
ma ybed amaged. X
Stop the vehicle. Pa yattentio ntotrafficconditions as yo udoso.
X Allow the engine and coolant to cool.
X Check the coolant level (Y page 180).Obser ve the warning notes.
To pupt he coolant if necessary.
X Have the coolant syste mchecked at aqualified specialis twork-
sho pift he coolant needs topping up mor eoftenthanu sual. Practical advice
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Troubleshooting
237Problem Possible cause/consequence Suggeste
dsolutions D
Ther ed coolant warning
lamp comes on whil ethe
engine is running .You will
also hear awarning tone. If the coolant level is correc
tand
the airflow to the radiato risnot
blocked, the radiato rfan ma ybe
malfunctioning.
Th ec oolant temperatur ehas
exceeded 120 †. Th eengine is
not being coole dsufficiently and
ma ybed amaged. X
Do not continue driving under any circumstances.
X Consult aqualified specialis tworkshop. ±
They ello wengine diagnos-
tics warning lamp comes
on whil ethe engine is run-
ning. There ma
ybeamalfunction:
R in the fuel injectio nsystem
R in the exhaust system
R in the ignition system
Th ee mission limi tvalues maybe
exceeded and the engine ma ybe
running in emergency mode. X
Have the vehicl echecked as soon as possibl eataqualified spe-
cialist workshop. \
They ello wroll-over bar
warning lamp is lit. G
Ris
kofi njury
Th er oll-over ba risnot ready for
operation. X
Rais ethe roll-over ba r(Ypage 46).
X Visi taq ualified specialis tworkshop. Practical advice
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Troubleshooting
245Problem Possible cause/consequence Suggeste
dsolutions Th
ee ngine is not running
smoothly and is misfiring. There is
amalfunctio nint he
engine electronics or amechani-
cal component of the engine con-
trol unit. X
Onl ydepress the accelerator peda lsligh tly.
X Have the caus erectifie dimm ediatel yataq ualified specialis twork-
shop.
Otherwise, non-combuste dfue lm aygetinto the catalytic converter
and damage it. Ac
oolant temperatur eofover
120 °C is displayed. Th ecoolant
warning lamp ma yalsobeona nd
aw arning tone ma ysound
(Y page 106). Th
ec oolant level is too low. The
coolant is too ho tand the engine
is no longe rbeing coole dsuffi-
ciently. X
Stop as soon as possibl eand allo wthe engine and the coolant to
coo ldow n.
X Check the coolant level (Y page 180).Obser ve the warning notes
as yo udosoa nd top up the coolant if necessary. If the coolant level is correct, the
radiato
rfan ma ybef aulty.The
coolant is too ho tand the engine
is no longe rbeing coole dsuffi-
ciently. X
If the coolant temperatur eislesst han1 20 °C ,you can continue
driving to the neares tqualified specialis tworkshop.
X Avoi dheavy loadsont he engine as yo udoso,e.g .whend riving on
mountai nroads and stop/star tdriving. Practical advice
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Troubleshooting
246 Automatic transmission
Problem Possible cause/consequence Suggeste
dsolutions Th
et ransmission ha sproblems
shifting gear Th
et ransmission is losing oil. X
Have the transmission checked at aqualified specialis tworkshop
immediately. Th
ea cceleratio nability is deteri-
orating.
Th et ransmission no longer
change sgear. Th
et ransmission is in emergency
mode.
It is onl ypossibl etos hift into
2nd gear and revers egear. X
Stop the vehicle.
X Move the selector lever to P.
X Turn the key to position 0in the ignition lock.
X Wait at leas t10second sbefor er estarting the engine.
X Move the selector lever to position Dor R.
If D is selected ,the transmission shifts into 2ndgear;ifRis selec-
ted ,the transmission shifts into revers egear.
X Have the transmission checked at aqualified specialis tworkshop
immediately. Practical advice
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Troubleshooting
252 Problem Possible cause/consequence Suggeste
dsolutions Th
ek ey cannot be turned in the
ignition lock. Th
ek ey ha sbeeninp osition0for
ac onsiderabl etime. X
Remov ethe key and reinsert it into the ignition lock.
X Check the starter battery and recharge it if necessary
(Y page 276).
X Star tthe engine. Th
eo n-board voltag eistoo low. X
Switch off non-essentia lconsumers ,e.g.s ea th eating* or interior
lighting ,and try to tur nthe key again.
If thi sdoesn ot work:
X Check the starter battery and recharge it if necessary
(Y page 276).
or
X Jump-start the vehicl e(Ypage 279).
or
X Consult aqualified specialis tworkshop. Practical advice
*optional
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Towin
gand tow-starting 280
X
Connect negative terminal 3of the donor
battery to negative terminal 4of your
vehicle' sbattery using the jum plead, con-
necting the jum pleadtot he donor battery
first.
X Star tthe engine.
X Electrical consumers can be switched on
again. Do not switch the lights on, however,
as thi swillo verloa dthe battery.
X Remov ethe jum pleadf rome arth
point 4and negative terminal 3first,
the nfromp ositivet erminals 1and 2,
each tim edisconnecting fro mthe battery
on your ow nvehicl efirst.
X Have the battery checked at aqualified
specialis tworkshop ,e.g.aM ercedes-Benz
Service Centre. Towin
gand tow-starting Points to remember
G
Ris
kofa ccident
If yo utow the vehicle, yo umustu se arigid
towing ba rif:
R the engine is not running
R there is abrake syste mmalfunction
R the voltag esuppl yort he vehicle' selec-
trica lsystemisd amaged
Th ee lectric powe rsteering and the brake
force booster do not work when the engine
is not running .Greate rbraking force will
the nberequired and the brake peda ltravel
will be longer. If necessary ,depress the
brake peda lwithm aximum force.
Do not tow the vehicl eifthe key cannot be
turned in the ignition lock. If thi sisthe case,
the steering is locked and the vehicl ecan-
not be steered.
If yo utow or tow-start anothe rvehicle, its
weight must not exceed the maximum per-
missibl egross vehicl eweigh tofy ourv ehi-
cle. G
Ris
kofa ccident
Th eS BC®
brake syste mrequires electrical
power. Th eSBC®
brake syste menters
emergency mod eifthere ar efaults in the
powe rsuppl yort he vehicle' selectrica lsys-
tem. Greater braking force will the nbe
required and the brake peda ltravel and
braking distance will be longer. If neces-
sary ,depress the brake peda lwithm axi-
mu mf orce.
Th ev ehicl eisb raked if SBC ®
HOL Disa cti-
vated .The refore, deactivate SBC ®
HOL Dif
the vehicl eistobet owed.
If yo utow or tow-start anothe rvehicle, its
weight must not exceed the maximum per-
missibl egross vehicl eweigh tofy ourv ehi-
cle.
It is better to have the vehicl etransported
tha ntoh aveitt owed.
When towing ,obser ve the lega lrequirements
in al lcountries concerned.
! When towing ,pulla wa yslowl yand with-
ou tjerking. If the tractiv epower is too high,
the vehicles could be damaged. Do not use
the towing ey efor recovery. Practical advice
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