Page 31 of 482
RDolby®and MLP™ areregis tere d trademar ks
of DOLBY Laboratories.
RBabySmart™, ESP®and PRE-SAFE®are reg‐
is te re d trademar ksof Daimler AG.
RHomeLink®is a regis tere d trademark of
Johnson Contro ls.
RiPod®andiTunes®are regis tere d trademar ks
of Apple Inc.
RBurmes ter®is a regis tere d trademark of
Burmes terAu diosy steme GmbH.
RMicrosoft®and Windo wsMedia®are regis‐
te re d trademar ksof Microsoft Corporation.
RSIRIUS®is a regis tere d trademark of Sirius
XM Radio Inc.
RHD Radio™ is a regis tere d trademark of iBiq‐
uity Digital Corporation.
RGraceno te®is aregis tere d trademark of
Graceno te, Inc.
RZAGA TSurve y®and related brands are regis‐
te re d trademar ksof ZagatSur vey, LLC.
General no tes 29
Page 60 of 482
Requirements
Yo ure qu ire a CR 2032 3 V cell batter y.
Mercedes-Benz recommends that you ha vethe
battery replaced at a qualified specialist work‐
shop.
#Re mo vethe mechanical key (→pag e57 ).
#Press release button 2down fully and
re mo vecover1.
#Re mo vebattery compartment 3and take
out the dischar ged batter y.
#Insertthe new battery into battery compart‐
ment 3. Obser vethe positive pole marking
in the battery compartment and on the bat‐
te ry.
#Push in battery compartment 3.
#Replace co ver1 sothat it engages.
Problems with the SmartK ey
Problem
Possible causes/consequences and MSolutions
Yo u can no longe r lock or unlock the
ve hicle. Po
ssible causes are:
RThe SmartK eybattery is dischar ged or nearly dischar ged.
RThere is inter fere nce from a po werful radio signal source.
58
Opening and closing
Page 63 of 482
#Tounlock theve hicle: touch the inner sur‐
fa ce of the door handle.
#To lock theve hicle: touch sensor sur face
1 or2.
#Co nvenience closing: touch recessed sen‐
sor surf ace2for an extended pe riod.
% For fur ther information on con venience clos‐
ing (
→pa ge 72).
If yo u open the trunk lid from outside, the trunk
lid is automatically unloc ked.
Problems with KEYLESS-GO
Problem
Possible causes/consequences and MSolutions
Yo u can no longe r lock or unlock the
ve hicle using KEYLESS-GO. Po
ssible causes are:
RKEYLESS-GO has been deactivated .
RThe SmartK eybattery is dischar ged or near lydischar ged.
RThere is inter fere nce from a po werful radio signal source.
Opening and closing 61
Page 125 of 482
Infraredreflective windshield
The inf rare dre flective windshield is coated and
pr eve nts an excessive build-up of heat in the
ve hicle interior.
The coating shields theve hicle interior against
ra dio waves up into the gigahertz range.
Ra dio-cont rolled equipment, such as toll sys‐
te ms, can only be mounted on areas of the wind‐
shield which are permeable toradio wav es1.
Areas permeable toradio wav es1 are best visi‐
ble from outside theve hicle when the windshield
is illuminated using an extern al light source.
Light and visibility 12
3
Page 209 of 482