Fu
nction of ther adar senso rs Some driving and driving sa
fety sy stems use
ra dar sensor stomonitor thea reainf ront of,
behind or next tothev ehicle (depending on the
ve hicle's equipment).
Depending on thev ehicle's equipment, ther adar
senso rsarei ntegrated behind theb umpers
and/or behind ther adiator grille. Keep these
parts free of dirt, ice and slush (→ page402).
The sensor smustn otbe co vered, fore xamp le
by bicycle rack s, ove rhanging loads or radar-
re flecting sticke rs.F ollowing an impact and in
th ee vent of associated dama ge,w hic hm aynot
be visible, totheb umper sorradiator grille, ha ve
th ef unction of ther adar senso rscheckedata
qu alified specialis tworks hop. The driver assis‐
ta nce sy stem ma ynolonger workproperly. Overvie
wofdriving sy stems and driving
saf etys ystems In
this section, youw illfind informatio nabout
th ef ollowing driving sy stems and driving saf ety
sy stems:
R 360° Camer a(→pag e229)
R ABS (A nti-lock Braking System)
(→ pag e195)
R ActiveD ista nce Assi stDISTRONIC
(→ page 209)
R Adaptiv ebrake light s(→pag e205)
R AIRB ODYC ONTROL (→ page219 )
R ActiveB rake Assi st (→pag e201 )
R ActiveL aneK eeping Assis t(→pag e250)
R ATTENTION ASSIS T(→ pag e244)
R BAS(Brake Assist System) (→ page196)
R DYNA MIC BODY CONTROL (→ page219 )
R EBD ( Electronic Brakeforce Distribution)
(→ pag e200)
R ESP ®
(Elect ronic Stability Program)
(→ pag e196) R
Hill StartA ssist
R HOL Dfunction (→ page218)
R STEER CONTROL (→ page 201)
R ActiveS teering Assis t(→ pag e215 )
R Limi ter( →pag e206)
R ActiveP arking Assis t(→pag e233)
R Parking Assis tPARKTRONIC (→ page 223)
R Reversing camer a(→pag e227)
R Cruise control (→ page206)
R Blin dSpotA ssis tand ActiveB lind Spo tAssist
( → pag e248)
R Traf ficS ign Assi st (→pag e246) Fu
nctions of ABS (anti-loc kbraking sy stem) AB
Sr egulates theb rake pressur eincritical driv‐
ing situations:
R During braking, e.g. at maximum full-s top
braking or insuf ficient traction of thet yres,
th ew heels ar epreve nted from blocking.
R Vehicle steerability while braking is ensured. Driving and parking
19 5
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
? Coolant warning lamp The
redc oolant warning lam pislit while thee ngine is running.
Po ssible causes:
R The temp eratur esensor is malfunctioning
R Coolant le veltoo low
R The air suppl ytotheradiator is obstructed
R The radiator fani sfaulty
If th er eisana dditional warning tone, thec oolant temp eratur ehasexceeded 120° C. &
WARNING Danger of bu rnsw hen opening theb onnet
If yo uo pen thee ngine bonn etwhen thee ngine has overheated or during afireint he engine compartment, you
could come int ocontact wi thhotg ases or other escaping operating fluids. #
Befor eopening theb onnet ,allowt he engine tocool down. #
Inthee vent of afireint he engine compartment, keep thee ngine bonn etclosed and cal lthe fire service. #
Stop thev ehicle immediately ,paying attention toroad and traf ficc onditions ,and switc hoffthee ngine. Do no tcon‐
tinue driving under an ycircums tances. #
Obser vethem essages in them ultifunction displa y.
If th ec oolant temp eratur edispla yisatt he lowerend of thet emperatur escale: #
Consult aqualified specialis tworks hop. 536
Displa ymessages and warning/indicator lamps
