Page 307 of 446

Rthee nergy supply or theo n-boar delectri‐
cal sy stem is malfunctioning.
When your vehicle is then towe da way,signif‐
icantly mor eeffor tm aybe requ iredtosteer
and brak ethan is normally required.
#Useatow bar.
#Mak esuret hat thes teering wheel can
mo vefreely ,befor etow ing thev ehicle
aw ay.
* NO
TEDama gedue to to wing away at
exc essivel yhigh speeds or overlong dis‐
ta nces
The driv etra in could be damaged when tow‐
ing at excessively high speeds or over long
dis tances.
#At ow ing speed of 31mp h(50 km/h)
mus tnotbe exc eeded.
#Atow ing dis tance of 31mile s(50 km)
mus tnotbe exc eeded.
Ifav ehicle mus tbetow st artedort owedaway,
its weight mus tnotexc eed thep ermissible gross
mass of thet ow ing vehicle.
&
WARNING Risk of accident whe ntow ing
av ehicle whic histoo heavy
If th ev ehicle being tow- star tedort owed
aw ay is heavier than thep ermissible gross
mass of your vehicle, thef ollowing situations
can occur:
RThe towing eyem aybecome de tach ed.
RThe vehicle/trailer combination may
swer veoreve noverturn.
#If ano ther vehicle is tow- star tedo r
to we da way,its weight mus tnotexc eed
th ep ermissible gross mass of your ow n
ve hicle.
#Information on thep ermissible gross mass of
th ev ehicle can be found on thev ehicle iden‐
tification plat e(
→page342). During
thet ow ing procedure, obser vethef ollow‐
ing:
RDeactivat ethe DISTRONIC dis tance pilot.
RDo no tactivate theH OLD function.
RVehicles with automatic transmission: Do
no to pen thed rive r's door or front passenger
door ,otherwise thea utomatic transmission
automaticall yshifts toposition j.
#Makesuret hat theb atter yisc onnected and
ch arge d.
When theb atter yisd ischar ged:
RThe engin ecann otbe star ted.
RThe elect ricp arkin gb rake canno tbe
re leased or applied.
RVe hicles with automatic transmission:
The au tomatic transmission canno tbeshif‐
te dtop osition iorj.
#Ins tallth et ow ing eye(→pag e307).
#Attach thet ow bar.
Breakdown assis tance 305
Page 308 of 446

*NO
TEDama gedue toincor rect connec‐
tion
#Onl yconnect thet ow ro pe or towb arto
th et ow ing eyes.
#Deactivat eautomatic locking (→pag e62).
#Deactivat eActiv eBrake Assi st(→pag e156).
#Vehicles with automatic transmission:
Shif tthe automatic transmission toposition
i.
% Vehicles with automatic transmission: If
th ea utomatic transmission cannot be shif‐
te dtop osition i,havethev ehicle trans‐
por teda way(
→pag e306).
#When towing away wit hthe rear axle
ra ised: movethef ront wheels int othe
st ra ight-ahead position.
#When towing away wit hone axle raised:
switc hont he powersupp ly.
#When towing away wit hbotha xleson
th eg round: switch onthei gnition.
#Re lease thee lectric parking brake. *
NO
TEDama gedue toexcessiv etracti ve
po we r
Ifyo up ullaway sharpl y,thet ractiv epowe r
ma ybet oo high and thev ehicles could be
damaged.
#Pull away slowl yand smoo thly.
Loading the vehicl efor transport
Transpor tatio nofv ehicles should onl ybecarried
out byprofessional reco very companies.
#Obser vethen otes on towing away
(→pag e304).
#Connec tthe towb arto thet ow ing eyet o
load thev ehicle.
#Vehicles with automatic transmission:
Shif tthe automatic transmission toposition
i.
% Ve
hicles with automatic transmission:
The au tomatic transmission ma ybelocked
in position jinthee vent of damage tothe
electrics. Toshif ttoi,p rovide theo n- boar
delectrical sy stem wit hpowe r
(
→pag e301).
#Load thev ehicle ont othe transpor ter.
#Ve hicles with automatic transmission:
Shif tthe automatic transmission toposition
j.
#Use thee lectric parking brak etosecurethe
ve hicle and pr event it from rolling away.
#Onl ysecur ethe vehicle bythew heels.
4MATIC vehicles/ vehicles with automatic
transmission
#Mak esuret hat thef ront and rear axle scome
to rest on thes ame transpor tvehicle.
306
Breakdown assis tance
Page 309 of 446
*NO
TEDama getothed rive trai ndueto
incor rect positioning
#Do no tposition thev ehicle abo vethe
connection point of thet ranspor tvehi‐
cle.
Installing thet ow ing eye
%
The towing eyeisp artoft hevehicle tool kit.
#Press them arkonc over 1 inwa rdsa nd
re mo ve.
#Scr ew inthet ow ing eye clockwise tothe
st op.
% Mak esuret hat co ver1 engages in the
bumper when your emo vethet ow ing eye. *
NO
TEDama gedue toincor rect us eof
th et ow ing eye
When atow ing eyeisu sedtoreco verav ehi‐
cle, thev ehicle ma ybedamaged in thep roc‐
ess.
#Onl yusethet ow ing eyetot owaway or
to ws tart thev ehicle.
Tows tarting thev ehicle (emer gency engine
st art)
* NO
TEDama getothea utomatic trans‐
mission due to towstarting
The automatic transmissionm aybe damaged
in thep rocess of tows tartin gv ehicles with
automatic transmission.
#Ve hicles wit hautomatic transmission
mus tnotbe tows tarted.
Breakdown assis tance 307
Page 336 of 446

Notesons toring wheels
RAf terr emoving wheels, stor et hem in acool,
dr ya nd preferably dar kplace.
RProtect thet ires from conta ct withoil, grease
or fuel.
Preparing thev ehicle foraw heelchange
Prerequisi tesRThe requ ired tire-chang etool kit is available.
If yo ur vehicle is no tequipped wit hthe tire-
ch ang etool kit, consult aqualified specialis t
wo rkshop tofind outa boutsuitable tools.
RThe vehicle is no tonaslope.
RThevehicle is on solid, non-slipper yand le vel
ground .
#Applythee lectric parking brak emanually.
#Movethef ront wheels tothes traight-ahead
position.
#Ve hicles with automatic transmission:
shif tint op osition j.
#Vehicles with AI RBODYC ONT ROL:setthe
normal vehicle le vel(→pag e171).
#Switc hoffthee ngine.
#Mak esuret hat thee ngine cannot bestar ted.
#Place choc ks orother suitable items under
th ef ront and rear of thew heel that is diago‐
nall yopposit ethe wheel youw ish tochange.
#Re mo vetheh ub caps if necessary
(→pag e334).
#Raise thev ehicle (→pag e335).
Removing and mounting hub caps
Requirements
#The vehicle is prepared foraw heelc hange
(→pag e334).
Plast ic hub cap
#Toremo ve:tur nthe center co veroft he hub
cap counter-clockwise and remo vetheh ub
cap.
#To mount: makesurethat thec enter co ver
of theh ub cap is turned counter-clockwise.
#Position theh ub cap and tur nthe center
co verc lockwise until theh ub cap engages
ph ysicall yand audibly.
Aluminum hub cap
#To remo ve:positio nsocket2 on hubc ap
1.
% The soc ketc an be found in thev ehicle tool
kit.
#Po sition wheel wrench 3on soc ket2.
#Using whee lwrench 3,t urnh ub cap 1
counter-clo ckwise and remo veit.
334
Wheels and tires
Page 343 of 446

1Front roof area
2Re ar roof area
3Re ar fender
4Trunk lid
On vehicles wit hapanoramic sliding sunroof,
ins talling an antenn aonthe front or rear roof
area is no tpermitted. On
ther ear fende rs,itisr ecommende dtoposi‐
tion thea ntenn aonthe side of thev ehicle clos‐
es ttot he center of ther oad.
Use Tech nica lSpecificatio nISO/T S21609 (Road
Ve hicles –EMC guidelines fori ns tallation of
af te rm arke tradio frequency transmittin gequip‐
ment )when retrofitting RF (radio frequency)
transmitters. Co mply wi th th elegal requirements
fo rd etachable parts.
If yo ur vehicle has ins tallation sfor two-w ayradio
equipment ,use thep ower suppl yorantenna
connectionsi ntendedforu se wit hthe basic wir‐
ing. Be sur etoobservethem anufacturer's addi‐
tional instruction swhen ins talling.
The maximum transmission output (PEAK) at the
base of thea ntenn amustn otexc eed thev alues
in thef ollowing table: Fr
equency band and maximum transmission
output
Fr equency band Maximu mtransmis‐
sion output
Sho rtwa ve
3-54M Hz 10
0W
4mb and
74 -88M Hz 30 W
2mb and
14 4-1 74MHz 50 W
Tr unked radio sys‐
te m/T etra
380 -460 MHz 10
W
70 cm band
400 -460 MHz 35 W
Mobile communica‐
tions (2G/3G/4G) 10
W
Tech nica ldata 34
1
Page 344 of 446
Thefollowing can be used in thev ehicle without
re strictions:
RRF transmitter wi tham aximum transmission
output of up to100m W
RRF transmitter switht ransmitter frequencies
in the3 80 -410 MHz frequency band and a
maximu mtransmissio noutpu tofu pto2 W
(trunked radio sy stem/T etra )
RMobile phones (2G/3G/4G)
Ther eareno restrictions whe npositioning the
antenn aonthe outside of thev ehicle fort he fol‐
lowing frequenc ybands:
RTrunked radio sy stem/T etra
R70 cm band
R2G/3G/4G
Ve hicl eidentification plate, VIN and engine
number
Ve hicl eidentification plate
Vehicle identification plat e(US Ao nly)
1
Pe rm issible grossmass
2Pe rm issible front axle load
3Perm issible rear axle load
4Pa int code
5VIN (vehicle identification number)
34 2
Tech nica ldata
Page 389 of 446
Displaymessages
Possible causes/consequences and MSolutions
Â
Replace Key Battery*T
he SmartK eybatter yisdischar ged.
#Chang ethe batter y.
Â
ObtainaNew Key *T
he SmartK eyneeds tobe replaced.
#Consult aqualified specialis tworks hop.
Ve hicle
Displa ymessages
Possible causes/consequences and MSolutions
Apply Brake to Shift from
'P' *
Yo uh ave attem ptedtos hiftthe transmission out of position jand int oanother transmission position.
#Depress theb rake pedal.
To Deselec tPorN,
Depress Brakea nd Start
Engine *
Yo uh ave attem ptedtos hiftthe transmission out of position jori intoa nother transmission position.
#Depress theb rake pedal.
#Startt he engine.
Displa ymessages and warning/indicator lamps 387
Page 390 of 446

Displaymessages
Possible causes/consequences and MSolutions
Driver's Door Open &
Transmission Not in PRisk
of Vehicle Rolling Away *
The driver's door is no tfully closed and thet ransmission is in position k,iorh.
#Switc hthe transmission toposition jwhen youp arkt he vehicle.
NP ermanently Active Risk
of Rolling Away *
While thev ehicle is rolling or while youa redrivin g,youh aves hiftedt he transmission toposition i.
#Depress theb rake pedal tostop and, when thev ehicle is stationar y,shif tthe transmission toposition j.
#Tocontinu eyour journe y,shif tthe transmission toposition h.
Only Shift to 'P' when Vehi-
cle is Stationary *
The transmission can onl ybeshiftedtop osition jwhen thev ehicle is stationar y.
Service Require dDoNot
Shif tGears Visit Dealer *T
he transmission is malfunctioning. The transmission position can no longer be shif ted.
#When thet ransmission is in position h,consult aqualified specialis tworks hop and do no tshif tthe transmis‐
sion position.
#Fo ra llot her transmission positions, par kthe vehicle safely.
#Consult aqualified specialis tworks hop or breakdown service.
Transmission Malfunction
Stop *
The transmission is malfunctioning. The transmission switches toposition iautomatically.
#Pull overand stop thev ehicle safely as soon as possible, paying attention toroad and traf ficc onditions.
#Switc hthe transmission toposition j.
#Consultaqualified specialis tworks hop.
Reversing Not Possible
Service Required *T
he transmission is malfunctioning. Reverseg ear can no longer engaged.
#Consult aqualified specialis tworks hop.
388
Displa ymessages and warning/indicator lamps