Page 110 of 474

109 Controls in detailSeats
Seats
For information on seat adjustment, see 
“Adjusting” (
page 35).
Front seat active head restraintsYou cannot remove the active head re-
straints on the driver’s and passenger’s 
seat.
For removal of the active head restraints 
we recommend that you contact an autho-
rized Mercedes-Benz Center.
For information on head restraint 
adjustment, see “Seats” (
page 35).
For information on active head restraints, 
see “Active head restraint” (page 73).
Rear seat head restraints
Warning!
G
For your protection, drive only with properly 
positioned head restraints.
Adjust head restraint so that the head re-
straint supports the back of the head at eye 
level. This will reduce the potential for injury 
to the head and neck in the event of an ac-
cident or similar situation.
Do not drive the vehicle without the seat 
head restraints. Head restraints are 
intended to help reduce injuries during an 
accident.
iAdjust the head restraint in such a way 
that it is as close to the head as 
possible.
Warning!
G
For safety reasons, always drive with the 
rear head restraints in the upright position 
when the rear seats are occupied.
Keep the area around head restraints clear 
of articles (e.g. clothing) to not obstruct the 
folding operation of the head restraints. 
     
        
        Page 111 of 474

110 Controls in detailSeatsHead restraint height (rear outer seats)
1Release button
Raising
Manually adjust the height of the head 
restraint by pulling it upward.
If the head restraint is fully retracted, 
push release button1 and pull the 
head restraint out.
Lowering
To lower the head restraint, push 
release button1 and push down on 
the head restraint.Folding head restraints back with 
release button
The rear seat head restraints can be folded 
backward for increased visibility.
1Release button
Push release button1.
The head restraint will fold backward.
iAdjust the head restraint in such a way 
that it is as close to the head as 
possible.Warning!
G
For your protection, drive only with properly 
positioned head restraints.
Adjust head restraint so that the head re-
straint supports the back of the head at eye 
level. This will reduce the potential for injury 
to the head and neck in the event of an ac-
cident or similar situation.
Do not drive the vehicle without the seat 
head restraints. Head restraints are 
intended to help reduce injuries during an 
accident.
iYou can also fold the rear outer seat 
head restraints back using the switch 
in the center console (
page 111). 
     
        
        Page 112 of 474
111 Controls in detailSeats
Folding head restraints back with 
switch in the center console
1Switch for rear seat head restraints
Start the engine (
page 48).
Press switch1.
The rear seat head restraints will fold 
backward.Placing head restraints upright
Pull the head restraint forward until it 
locks into position.Head restraint tilt (rear outer seats)
Two different head restraint angle 
positions are available:
Press the release button (
page 110) 
and tilt the head restraint to the 
desired position.
Removing and installing rear seat head 
restraints (rear outer seats)
Warning!
G
Make sure the head restraints engage when 
placing them upright. Otherwise their 
protective function cannot be assured.
iAdjust the head restraint in such a way 
that it is as close to the head as 
possible.iThe rear center seat head restraint 
cannot be removed. 
     
        
        Page 113 of 474

112 Controls in detailSeats
1Release button
Removing rear seat head restraints
Fold back head restraint (
page 110).
Pull head restraint to its highest 
position.
Push release button1 and pull out 
head restraint.
Installing rear seat head restraints
Insert head restraint and push it down 
until it engages.
Push button1 and adjust head 
restraint to desired position.
Lumbar support*
The curvature of the driver’s seat can be 
adjusted to help enhance lower back sup-
port and seating comfort.
1Adjustment lever
Move adjustment lever1 in the direc-
tion of arrows until you have reached a 
comfortable seating position.
Warning!
G
For your protection, drive only with properly 
positioned head restraints.
Adjust head restraint so that the head re-
straint supports the back of the head at eye 
level. This will reduce the potential for injury 
to the head and neck in the event of an ac-
cident or similar situation.
Do not drive the vehicle without the seat 
head restraints. Head restraints are intend-
ed to help reduce injuries during an acci-
dent.
Do not interchange head restraints from 
front and rear seat. 
     
        
        Page 468 of 474

467 Index
R
Radio
Operation 202, 207
Selecting stations (Control 
system) 136
Radio transmitters 291
Range (distance to empty) 156
Reading lamp 125
Rear bench seat, foldable* 253
Rear door window
Blocking operation 85
Rear fog lamp see Fog lamps
Rear lamps see Tail lamps
Rear outer seats
Adjusting head restraint height 110
Rear passenger compartment
Adjustable air vents 184, 197
Rear seat ashtray see Ashtray
Rear seat head restraints see Head 
restraints
Rear view mirrors see Mirrors
Rear window defroster 175
Rear window sunshade* 174
Recommended tire inflation 
pressure 333Recovery services, Stolen vehicle 
(Tele Aid*) 273
Refrigerant, Air conditioning 442
Refueling 294
Regular checks 295
Remote control, SmartKey 98
Remote door unlock (Tele Aid*) 272
Replacing bulbs
Additional turn signal lamps 403
Backup lamp 404
Brake lamps 404
Corner-illuminating front fog 
lamps* 398
Fog lamps 404
Headlamps 398, 400, 402
High beam headlamps 398, 400
License plate lamps 404
Low beam headlamps 400
Parking lamps 401, 403, 404
Side marker lamps 403
Standing lamps 401, 403
Tail lamps 399, 404
Turn signal lamps 401, 403, 404
Reporting safety defects 18
Research Octane Number see RONReset button, In the instrument 
cluster 127, 141
Reset tool
Location 394
Residual heat utilization 197
Residual ventilation 197
Restraint system
see Children in the vehicle
see Infant and child restraint systems
see SRS
Restraint system see Infant and child 
restraint systems
Reverse gear position, Automatic 
transmission* 49
Reverse gear position, Manual 
transmission 48
Rims 333, 432
Roadside Assistance 12
RON 453
Roof rack* 250
Rubber parts, Cleaning 346
Run Flat Indicator* (Canada only) 317