Page 385 of 561

384 Operation
Winter driving
Before the onset of winter, have your
vehicle winterized at an authorized
Mercedes-Benz Light Truck Center. This
service includes:
Check of anticorrosion and antifreeze
concentration.
Addition of cleaning concentrate to the
water of the windshield and headlamp
cleaning system. Add MB Concentrate
“MB SummerFit” to a premixed wind-
shield washer solvent/antifreeze
which is formulated for temperatures
below freezing point (
page 530).
Battery test. Battery capacity drops
with decreasing ambient temperature.
A well charged battery helps to make
sure that the engine can be started
even at low ambient temperatures.
Tire change. Mercedes-Benz recom-
mends M+S rated radial-ply tires with a
minimum tread depth of approximately
1/6in (4 mm) on all four wheels for the
winter season.
Winter tires
Always use winter tires at temperatures
below 45°F (7°C) and whenever wintry
road conditions prevail. Not all M+S rated
tires provide special winter performance.
Make sure the tires you use show the
mountain/snowflake.marking on the
tire sidewall. These tires meet specific
snow traction performance requirements
of the Rubber Manufacturers Association
(RMA) and The Rubber Association of Can-
ada (RAC) and have been designed specif-
ically for use in snow conditions. Use of
winter tires is the only way to achieve the
maximum effectiveness of the ABS, ESP
®,
4-ETS, and EBP in winter operation.
For safe handling, make sure all mounted
winter tires are of the same make and have
the same tread design.Always observe the speed rating of the
winter tires installed on your vehicle. If the
maximum speed for which your tires are
rated is below the speed rating of your
vehicle, you must place a notice to this
effect where it will be seen by the driver.
Such notices are available from your tire
dealer or from any authorized
Mercedes-Benz Light Truck Center.
Warning!G
Winter tires with a tread depth of less than 1/6in (4 mm) must be replaced. They are no
longer suitable for winter operation.
Page 445 of 561

444 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
4Reserve FuelThe fuel level has gone below the reserve
mark.Refuel at the next gas station
(
page 337).
Ultra Low-sulfur
Diesel Fuel OnlyVehicles with diesel engine only:
The fuel level has gone below the reserve
mark.Refuel at the next gas station
(
page 337).
Only use commercially available
vehicular ULTRA-LOW SULFUR
HIGHWAY DIESEL FUEL
(15 ppm SULFUR MAXIMUM).
L Tele Aid
InoperativeOne or more main functions of the
Tele Aid system are malfunctioning.Have the Tele Aid system checked by
an authorized Mercedes-Benz Light
Truck Center.
Tele Aid
BatteryThe emergency power battery for the
Tele Aid system is malfunctioning. If the
vehicle battery is also malfunctioning or
drained, Tele Aid will not be operational.Have the Tele Aid system checked by
an authorized Mercedes-Benz Light
Truck Center.
tFunction
unavailableThis display appears if buttont
ors on the multifunction steering
wheel is pressed and the vehicle is not
equipped with a telephone.
W Top Up
Washer FluidThe fluid level has dropped to about 1/3 of
total reservoir capacity.Add washer fluid (page 346).
Page 491 of 561

490 Practical hints
Battery
!The battery is a valve-regulated lead acid
(VRLA) battery, also referred to as “fleece” bat-
tery. Such batteries do not require topping-up of
the electrolyte level. VRLA batteries therefore do
not have cell caps and the battery cover is
non-removable. Do not attempt to open the bat-
tery as otherwise the battery will be damaged.
Even though VRLA batteries do not require top-
ping-up of the electrolyte level and cannot be
opened to check the electrolyte level, the bat-
tery condition must be checked periodically by
performing a battery conductance test. Refer to
Maintenance Booklet for battery condition test-
ing intervals.
As with any other battery, the battery may dis-
charge if the vehicle is not operated for an ex-
tended period of time. You can connect a battery
maintenance charge unit tested and approved
for use on your vehicle model or disconnect the
battery to prevent battery discharge. Contact an
authorized Mercedes-Benz Light Truck Center
for more information.!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 hose
(
page 495) and the lateral plug (page 495)
must always be securely installed when the
vehicle is in operation.
Warning!G
Jump starting must only be done using the
jump-start contacts located in the engine
compartment (
page 497).
Warning!G
Failure to follow these instructions can re-
sult in severe injury or death.
Observe all safety instructions and precau-
tions when handling automotive batteries
(
page 489).
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.
Page 549 of 561

548 Index
Seat heating* see Seats
Seat ventilation* see Seats
Seating capacity 353
Seats 43, 127
Adjusting 43
Cushion depth, Multicontour
seat* 129
Folding the backrest forward 269
Heating* 130
Lumbar support 129
Memory function* 133
Multicontour seat* 129
Returning seat backrest to original
position 271
Ventilation* 131
Securing cargo 268
Cargo tie-down rings 268
Hooks 269
Selector lever see Gear selector lever
Self-test
Lamps in the instrument cluster 400
OCS 84
Tele Aid 295
Vehicle battery 489
Service and warranty information 10Service intervals see Maintenance, Service
indicator
Service life
Tires 349
Service see Maintenance
Service system see Maintenance System
Service, Parts 508
Settings
Adaptive Damping System
(ADS)* 255
Air suspension* 254
Clock 169
Comfort functions* 176
Control system menus 150, 152
Control system submenus 151, 153,
166
Date 153, 166, 169
Daytime running lamp mode 170
Factory, SmartKey 112
Factory, SmartKey with
KEYLESS-GO* 116
Individual, Vehicle 163
Instrument cluster 167
Language, multifunction display 167,
168
Lighting 170Memory function* 133
Resetting all, Control system 164
Selective, SmartKey 112
Selective, SmartKey with
KEYLESS-GO* 117
Time 169
Vehicle configuration 177
Vehicle level control* 255
Shift program (ML 63 AMG only) 194
Shifting
Automatic transmission 54
Shifting, Automatic transmission 183
Side impact air bags 78
Side marker lamps
Cleaning lenses 393
Messages in the multifunction
display 441
Replacing bulbs 464, 469, 472
Side windows see Power windows
Sidewall 381
SmartKey see Key, SmartKey
SmartKey see Key, SmartKey with
KEYLESS-GO*
Snow chains 385
Snow tires see Winter tires