Page 361 of 473
360 Practical hintsWhat to do if …Left display
Right display
Possible cause/consequence
Possible solution
P
Gear selector
lever to P
You have tried to start the engine with
the KEYLESS-GO* start/stop button
with the gear selector lever not in posi-
tion P.
Place the gear selector lever in position P.
You have tried to turn off the engine
with the KEYLESS-GO* start/stop but-
ton with the gear selector lever not in
position P.
Retractable roof
open/close
completely
The retractable hardtop is not locked
properly.
Push or pull on the retractable hardtop
switch until the indicator lamp in the
switch goes out and the retractable hard-
top is completely open or closed
(page 199).
Page 378 of 473
377 Practical hints
What to do if …
Left display
Right display
Possible cause/consequence
Possible solution
A
Fuel cap
open
A loss of pressure has been detect-
ed in the fuel system. The fuel cap
may not be closed properly or the
fuel system may be leaky.
Check the fuel cap (
page 271).
If it is not closed properly:
Close the fuel cap.
If it is closed properly:
Have the fuel system checked by an autho-
rized Mercedes-Benz Center.
K
being lowered
The retractable hardtop is not com-
pletely opened or closed. The roof
hydraulics will start to lose pres-
sure.
Make sure the retractable hardtop is com-
pletely opened or closed (
page 199).
locked
in driving mode
You have attempted to open the re-
tractable hardtop while driving.
Stop the vehicle in a safe location and try to
open the hardtop again.
O
You are driving with the hood open.
Risk of accident!
Stop the vehicle in a safe location or as soon
as it is safe to do so.
Close the hood (
page 275).
Page 416 of 473

415 Practical hints
Batteries
!
The factory-equipped VRLA battery is
leak-proofed. Only use a battery as replacement
that has the same security features and is of
identical size, voltage, and capacity as the
factory-equipped battery.
The battery, the battery ventilation and the later-
al plug must always be securely installed when
the vehicle is in operation.
Warning!
G
Failure to follow these instructions can re-
sult in severe injury or death.
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking, etc.
!
Never loosen or detach battery terminal
clamps while the engine is running or the
SmartKey is in the starter switch. Otherwise the
alternator and other electronic components
could be severely damaged.
Have the starter battery checked regularly by an
authorized Mercedes-Benz Center.
Refer to Maintenance Booklet for maintenance
intervals or contact an authorized
Mercedes-Benz Center for further information.
Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof batteries only to avoid the
risk of acid burns in the event of an acci-
dent.
Warning!
G
The brake system requires electrical power
to operate.
A malfunction in the vehicle’s power supply
or electrical system may impair brake sys-
tem operation and switch it into its emer-
gency operation mode. The same applies if
battery is disconnected. To brake, the driver
must then apply significantly greater brake
pedal pressure and depress the pedal much
further to obtain the expected braking ef-
fect. If necessary, apply full pressure to the
brake pedal. Brakes are only applied to the
front wheels. Stopping distance is in-
creased! Adjust your driving style according-
ly. For more information, see
“Electro-hydraulic brake system”
(page 92).
Page 464 of 473

463 Index
P
Paintwork code see Certification label
Panic alarm 86
Panic button on SmartKey 86
Panorama roof*
Sunshade 208
Sunshade closing 208
Sunshade opening 208
Parcel net
In front passenger footwell 236
Parcel net in trunk 237
Parking 263
Parking assistance (Parktronic*) 228
Parking brake
Engaging 61
Releasing 54
Parking brake pedal 25
Parking lamps 398
Switching on 128
Parktronic* 32, 228
Activating 231
Cleaning system sensors 326
Malfunctioning 231
Minimum distance 230
Range 229Rear sensors 230
System sensors 326
Warning indicators 25, 230
Parktronic* deactivation switch 32
Parts service 428
PASS AIR BAG OFF indicator lamp see
Front passenger front air bag off
indicator lamp
Passenger side
Front air bag 72
Pedals 259
Phone book* 166
Loading 167
Quick search 167
Phone number*
Dialing 166
Redialing 167
Plastic parts, cleaning 328
Poly-V-belt drive
Layout 432
Potential problems associated with under-
inflated and overinflated tires 301
Power assistance 260
Power closing assist for trunk lid 118
Power outlet 242Power seat
Adjusting backrest tilt 44
Adjusting head restraint height 44
Adjusting head restraint tilt 44
Adjusting seat cushion depth 44
Adjusting seat cushion tilt 44
Adjusting seat height 44
Power windows 196
Cleaning 326
Closing with KEYLESS-GO* 198
Side windows 196
Synchronizing 198
Problems while driving 59
Production options weight 313
Program mode selector switch
Automatic transmission 32, 173
PSI 313
PULSE function (Massage function) 122
Q
Quick search
Phone book* 167