brakes MERCEDES-BENZ E-CLASS CABRIOLET 2020 User Guide

It is only permissible
tofit a di fferent wheel
size in theev ent of a flat tyre in order to
drive tothe specialist workshop.
R Do not make any modifications tothe brake
sy stem, the wheels or the tyres.
The use of shims or brake dust shields is not
permitted and may in validate theve hicle's
ge neral operating pe rmit.
R Vehicles with a tyre pressure monitoring
sy stem: allfitted wheels mu stbe equipped
with functioning sensors forth e tyre pres‐
sure monitoring sy stem.
R Attemp eratures below 7 °C use winter tyres
or all-season tyres mar ked M+S for all
wheels.
Wi nter tyres bearing thei snowflake
symbol in addition tothe M+S marking pro‐
vide the best possible grip in wintry road
conditions.
R For M+S tyres, only use tyres with the same
tread.
R Obser vethe maximum permissible speed for
th e M+S tyres fitted. If
th e tyre's maximum speed is below that of
th eve hicle, this must be indicated byan
appropriate label in the driver's field of
vision.
R Run in new tyres at moderate speeds forthe
fi rs t10 0 km.
R Replace the tyres af ter six years at the latest,
re ga rdless of wear.
R When replacing with tyres that do not
fe ature run-flat characteristics: vehicles
with MOExtended tyres are not equipped
with a TIREFIT kit at thefa ctor y.Equip the
ve hicle with a TIREFIT kit af terre placing with
tyres that do not feature run-flat characteris‐
tics, e.g. winter tyres.
% You can permanently limit the maximum
ve hicle speed for driving with winter tyres
(/ page 194).
Fo r more information on wheels and tyres, con‐
ta ct a qualified specialist workshop.
Be sure toalso obse rveth efo llowing fur ther
re lated subjects:
R Notes on tyre pressure (/ page 326)R
Tyre pressure table (/ page 327)
R Notes on the emer gency spa rewheel
(/ page 340) Note
s on inter changing wheels &
WARNING Risk of inju rythro ugh dif fer‐
ent wheel sizes
Inter changing the front and rear wheels can
se verely impair the driving characteristics.
The disk brakes or wheel suspension compo‐
nents may also be damaged. #
Onlyinter change the front and rear
wheels if the wheels and tyres ha vethe
same dimensions. Inter
changing the front and rear wheels if the
wheels or tyres ha vediffere nt dimensions can
re nder thege neral operating pe rmit in valid.
The wear pat tern s on the front and rear wheels
dif fer:
R front wheels wear more on the tyre shoulder Wheels and tyres
333

Note
s on brake fluid Obser
vethe no tes on operating fluids
(/ page 345). &
WARNING Risk of an accident due to
va pour poc kets form ing in the brake sys‐
tem
The brake fluid cons tantly absorbs moi sture
from the air. This lo wersthe boiling point of
th e brake fluid. If the boiling point is too lo w,
va pour poc kets may form inthe brake sys‐
te m when the brakes are applied hard.
This impairs the braking ef fect. #
Have the brake fluid rene we d at the
specified inter vals. Ha
ve the brake fluid regularly replaced at a
qu alified specialist workshop.
Only use a brake fluid appr ovedby Mercedes-
Benz according toMB-F reigabe or MB-Appr oval
33 1.0. Coolant
Note
s on coolant
Obser vethe no tes on operating fluids
(/ page 345). &
WARNING Risk offire ‑ and inju ryfrom
antifreeze
If antifreeze comes into contact with hot
component parts in the engine compart‐
ment, it may ignite. #
Allow the engine tocool down before
yo uto p up the antif reeze. #
Make sure that no antifreeze spills out
next tothefiller opening. #
Thoroughly clean the antif reeze from
component parts before starting the
ve hicle. *
NO
TEDama gecaused byincor rect cool‐
ant #
Only use coolant that has been pre‐
mixed with therequ ired antifreeze pro‐
te ction.
Information on coolant is available at thefo l‐
lowing locations:
R inthe Mercedes-Benz Specification for
Operating Fluids 310.1
- at https://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo app
R at a qualified specialist workshop *
NO
TEOverheating at high outside tem‐
peratures If an inapp
ropriate coolant is used, the
engine cooling sy stem is not suf ficiently pro‐
te cted against overheating and cor rosion at
high outside temp eratures. #
Alw ays use coolant appr ovedby
Mercedes-Benz. Te
ch nical da ta353

Display messages
Possible causes/consequences and M
MSolutions
Stop vehicle Leave engine
running Wait Transmission
cooling *T
he transmission is overheating. Pulling away may be temp orarily impaired or not possible. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Lea vethe engine running. #
Wait until the display message disappears before pulling away.
Auxiliary battery malfunc-
tion *T
he auxiliary batteryforth e transmission is no longer being charge d. #
Consult a qualified specialist workshop. #
Untilthen, alw ays select park position jmanually before you swit choff the engine. #
Before leaving theve hicle, apply the electric parking brake. Brakes
Display messages
Possible causes/consequences and M MSolutions
! Parking brake See Owner's
Manual *
The yellow ! indicator lamp is lit. The elect ric pa rking brake is malfunctioning.
To appl y: #
Switch the ignition off and switch it back on. #
Apply the electric parking brake manually (/ page179).
If it is not possible toapply the electric parking brake: #
Consult a qualified specialist workshop. 380
Display messages and warning/indicator lamps

Wa
rning and indicator lamps Overview of indicator and
warning lamps Some sy
stems will per form a self-test when the
ignition is switched on. Some indicator and
wa rning lamps may briefly light up or flash. This
behaviour is non-critical. These indicator and
wa rning lamps indicate a malfunction only if they
light up or flash af terth e engine has been star‐
te d or during a journe y.
Instrument display Depending on
the display setting, the positions
of the indicator lamps on the instrument display
may dif fer from theex ample shown. Indicator and
warning lamps:
6 Re
stra int sy stem (/ page416)
ü Seat belt (/
page 416)
ï Trailer hit ch (/page 417)
Ù Powe rst eering (/ page417)
ÿ Coolantte mp erature (/ page418)
; Engine diagnostics (/
page 418)
% Preglow
# Electrical
fault (/ page418)
8 Re
ser vefuel with fuel filler flap loca‐
tion indicator (/ page418)
! Electric pa
rking brake (red)
(/ page 421)
! Electric parking brake (yellow)
(/
page 421)
J Brakes (yellow) (/
page 421)
J Brakes (red) (/
page 421)
L Distance warning (/ page 423)
ä AIRBODY CONTROL (/ page 423)
ä DYNA MIC BODY CONTROL
(/ page 423) !
ABS (/
page 424)
÷ ESP®
(/ page 424)
å ESP®
OFF (/ page 424)
h Ty
re pressure monitoring sy stem
(/ page 427)
T St
anding lights (/ page122)
L Low beam (
/page 122)
K High beam (/
page124)
#! Tu
rn signal light (/ page124)
R Re
ar fog light (/ page122) Displ
aymessa ges and warning/indicator lamps 415

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
8 Fu elreser ve wa rning lamp
lights up The
yellow fuel reser vewarning lamp lights up while the engine is running.
*T he fuel supply has dropped into there ser verange. #
Refuel. Brakes
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
! Elect ric pa rking brake indi‐
cator lamp (red)
!
The elect ric pa rking brake
(yellow) indicator lamp The
red elect ric pa rking brake indicator lamp flashes or is lit.
The yellow elect ric pa rking brake indicator lamp also lights up in theev ent of a malfunction.
* #
Notethe messages on the multifunction displa y. Displ
aymessa ges and warning/indicator lamps 421

Blind Spot Assi
st..................................... 228
Ac tivating/deactivating ...................... .231
Fu nction .............................................. 228
Sy stem limitations ...............................2 28
Blo wer
see Climate control
BlueTEC see AdBlue ®
Bonn et
Re setting (active bonnet) .................... 289
Boot lid Closing .................................................. 80
HANDS-FREE ACCESS .......................... .80
Locking separa tely ................................ .81
Opening .................................................79
Opening dimensions ............................3 54
Boot separator Closing .................................................. 84
Opening .................................................84
Brake Assi stSystem
see BAS (Brake Assi stSystem)
Brake fluid Notes .................................................. 353 Brake
forc e distribution
EBD (Elect ronic Brake forc e Distribu‐
tion) ..................................................... 185
Brakes ABS (Anti-lo ckBraking Sy stem) ........... 182
Ac tive Brake Assi st.............................. 186
Ad aptive brake lights .......................... .190
BA S (Brake Assi stSystem) .................. 182
Driving tips .......................................... 15 6
EBD (Electronic Brake forc e Distribu‐
tion) ..................................................... 185
HOLD function .................................... .204
Limi ted braking ef fect (salt-trea ted
ro ads) .................................................. 15 6
New/replaced brakepads/brake
discs .................................................... 154
Ru nning-in no tes ..................................1 54
Braking assistance see BAS (Brake Assi stSystem)
Breakdown Overview of the help functions .............. 16
To w- starting ........................................ 322
To wing away ........................................ 318
Tr ansporting theve hicle ......................3 20
Wheel change ...................................... 335 Breakdown
see Flat tyre
Buttons Steering wheel .....................................2 43 C
Calls Mercedes me ...................................... 269
Camera see 360° Camera
see Reversing camera
Car key
see Key
Car wash
see Care
Car wash (care) ....................................... 295
Car-to-X-Communication Displaying hazard warnings ................ .263
Care .......................................................... 302
360° Camera ....................................... 301
Air-water duct ...................................... 295
Car wash ............................................. 295
Carpet .................................................3 02 Index
433