382 Operation
Tyres
andwh eels
! Store tyres in a cool, dry place, preferably in
th e dark .Pr otec tth ety res fro moil, grease, pet-
rol and diesel fuel.
Do not clea nyo ur wheels with acidic wheel
cl eaners sin ce thesecould co rrode theh eads
of wh eel bolts.
Ty res with aspe cified direc tion of rotati on
ha ve additional bene fits, e.g. ifaq uaplan-
in go ccurs. Th eseadvantage scan onl ybe
enjoy edifthe tyres arefitted correspond-
ing to th edirec tion of rotation.
An arrow on th esidewall of the tyre indi-
ca tes its co rre ctdire ction of rot ation.
i Youm ay fi ta spare tyre* agains tth e direc-
ti on of rotation.
The MOExtend ed emer gencyru nn ing sys-
te me nabl esyou to conti nuedriving the ve-
hicl eeven when allair is lost from one or
mo re tyres.
You may only use theMO Extended run-flat
syste minconju nction with the tyr epres-
sure loss warning syste morthe tyrepres-
sure monitor*. Yo
uwi llfind note son drivin g with aflat
tyr ein the Pra ctical advice section
( = page 492).
Onlycorrect tyre pres sures whe nthe tyres
are cold.
Th ep ress ureo f wa rmtyre ssh ou ldonl ybe
co rrected if it is to olow fort he curre nt
op erating co nd itio ns .Warm tyres always
have highe r pressu res tha ncol dones.
You wil lfi nd a table of tyre pressure sfo r
dif ferent operati ngcond ition son thein-
side ofyour vehicl e’sfu el filler flap.
i Tyre pressure values giv enfor low loads are
mi nim um values whic hoff eryou good ride com-
fort charact eristic s.
You can, ho weve r, also usethe values forhi gh er
loads. Th ese are permissible and will not ad-
ver sely affec tth e running of the veh icle.Howev-
er , ride comfort will be impaired tosome degree.
Als ocheck thety re pressure of the spare
wheel*. Di
rect ion of rot ation MO
Exte nded run-flat syst em* Ty
re tread G
Risk of accident Plea
se keep in mind that:
! tyre grip decreases rapidly on wet roads
when the tread depth is lessthan 3mm.
You shou ldthus replace tyre sthat have
insuff icient trea d.
! Winter tyre ssh ou ldbe replac ed when
th etrea d dept his 4 mm or less because
ot he rwis e they no lo nger pro vide ade-
qua tegrip.
! tyre sca nbe subjec tto different level s of
we ar. You shouldthus regu larlych eck
th etread dept h andth e condi tion of the
trea dac ross theen tire width of alltyre s.
If ne cessary, turn thesteering wheel so
th at youc an seethe ty retrea dmore
ea sily.
Yo ucoul dothe rwise los econtrol of theve hi-
cl ea nd cause an accide ntdueto th ere-
duced gr ipof thetyre s on thero ad. Ty
re pres su res G
Risk of accident If
th e pr essur ein atyre drops repea tedly, in-
sp ect the tyre for forei gn objects andch eck
whether the ty reor valve are leaking. 216_R
E_2006-12a.book Seit e382 Montag, 2. Oktob er2006 12:06 12
383
Operation
Ty res andwh eels
Ty re pressure chan ges by approxim ately
0. 1b ar for eve ry10 °C chang ein ambient
te mp eratur e.
If yo umeasure thetyre pr essureindo ors
wh ere the te mperature differ sf rom the
outside te mperature, yo u will have to cor-
re ct the meas ured value acco rdingly.
Wh en the vehicle isdri ven, the tyre te m-
pe ratur e,an dw ith it the tyr epressure ,will
in cr ea se depe nding on the road speed and
the load on the tyres. Wh
ile the vehicle is inmo tion the tyre pres-
su re loss wa rningsyst emmonitors th etyre
pressure se t by evaluat ing the spe edof the
indi vidual wheels. Thesyst em can there-
fo re reco gnise any signific ant loss oftyre
pressure inawheel.
If th ewh eelspee dcha nges due todeclin-
in gt yrepressure ,a co rre spon ding warning
me ssag ewi ll appear in th emulti-f un ction
display.
Operat iono fthe tyre pres sure loss warn-
ing syst em is limitedor delayed if:
! snow chains are fi tted on your vehic le
! ther ear ewint er ro adcond itio ns
! youar e drivin gonaloos esurface
(e .g.s and or gravel)
! youha ve adop tedave ry sporty driving
st yle (driv ingo nabend athigh speed
or driving wi thahigh rate ofacce lera-
tion)
! youar e drivin gaheavy lo ad Restartin
gthe ty repres sure loss wa
rning syst em
Resta rtthe tyre pressure loss wa rning sys-
te m if:
! you have chan ged the tyre pre ssure
! youha ve chan gedth ewh eels ortyres
! you have fitted new wh eelsor tyres G
Risk of accide nt Ch
eckty re pressur ere gu larly, at least every
two week s.Ifth etyre pressu reis inc orrect,
you rveh icle ’s handl ing charact eristics cou ld
be alte re d or thet yrecou ld ex plode. Ty
re pr essur e lo sswa rning syst em G
Risk of acc ident Th
et yrep ressure loss warnin g systemdoes
not wa rnyou of an incorrec tly set tyr epr es-
su re.The tableinthe fu elfiller flap will help
you dec ide wh ether thety re pres su res
sh ould be co rrec ted.
Th et yrep ressure loss warnin g systemdoes
no trepl ace the need toregul arly ch eck the
ty re pr essure, sin ceaun ifor m pressu re loss
in all fourtyres cannot be identi fied bythe
ty re pres sure loss wa rningsyst em.
Th etyre pr essure loss warning syst emis not
abl eto warn you of asudde nloss ofpre s-
sure, e.g. following penetration bya foreign
object.
If this occu rs, bring th e ve hicle to ahalt by
br ak ingc arefully. Do not make any sudd en
steering movemen ts whendoing this. 216_R
E_2006-12a.book Seit e383 Montag, 2. Oktob er2006 12:06 12
