2003 MERCEDES-BENZ CLK430 CABRIOLET battery capacity

121 Automatic climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Air recirculation
This mode can be selected to temporarily reduce the
entry of annoying odors or dust into the vehicle’s
interior.
Outside air is not supplied to the vehicle’s interior.
To s el ect , p res s O button.
To cancel, press O button again.
The system will automatically switch from recirculated
air to fresh air
•after approx. 5 minutes at outside temperatures
below approx. 41
°F (5
°C),
•after approx. 30 minutes at outside temperatures
above approx. 41
°F (5
°C),
•after approx. 5 minutes, if button S is pressed.
If the windows should fog up from the inside, switch
from recirculated air back to fresh air.
At high outside temperatures, the system automatically
engages the recirculated air mode thereby increasing
the cooling capacity performance, switching to partially
fresh air within 30 minutes.Residual engine heat utilization
With the engine switched off, it is possible to continue
heating the interior for a short while.
Air volume and distribution are controlled
automatically.
To s e l e c t :
Turn electronic key in steering lock to position 1 or 0 or
remove key.
Press T button
This function selection will not activate if the battery
charge level is insufficient.
To c a n c e l :
Press T button.
The system will automatically shut off
•if you turn electronic key in steering lock to
position 2,
•after approx. 30 minutes,
•if the battery voltage drops.

208 Driving instructions
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
If the vehicle is parked after being driven on salt treated
roads, the braking efficiency should be tested as soon as
possible after driving is resumed while observing the
safety rules in the previous paragraph.Winter driving
Have your vehicle winterized at your authorized
Mercedes-Benz Center before the onset of winter.
•Check engine coolant anticorrosion/antifreeze
concentration.
•Additive for the windshield washer and headlamp
cleaning system: Add MB Concentrate “S” to a
premixed windshield washer solvent/antifreeze
which is formulated for below freezing temperatures
see page 255.
•Test battery: Battery capacity drops with decreasing
ambient temperature. A well charged battery helps
to ensure that the engine can be started, even at low
ambient temperatures.
•Tires: We recommend M+S rated radial-ply tires on
all four wheels for the winter season. Observe
permissible maximum speed for M+S rated
radial-ply tires and the legal speed limit.
In winter operation, the maximum effectiveness of the
antilock brake system (ABS) or of the electronic stability
program (ESP) can only be achieved with M+S rated
radial-ply tires and / or snow chains recommended by
Mercedes-Benz. Snow chains maximize performance.
Wa r n i n g !
If the vehicle becomes stuck in snow, make sure
that snow is kept clear of the exhaust pipe and
from around the vehicle with engine running.
Otherwise, deadly carbon monoxide (CO) gases may
enter vehicle interior resulting in unconsciousness
and death.To assure sufficient fresh air ventilation, open a
window slightly on the side of the vehicle not
facing the wind.

325 Index
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car careIndex Defrosting .................................................................... 119
Display and controls ..................................................118
Dust filter ................................................................... 122
Economy ...................................................................... 119
Rear window defroster ............................................. 120
Residual engine heat utilization (REST) ............... 121
Special settings .......................................................... 119
Automatic transmission................................................ 191
Emergency operation ............................................... 199
Fluid level................................................................... 253
Program mode selector switch................................ 198
Selector lever position.............................................. 194
Transmission selector lever,
manually unlocking .................................................. 276
BBabySmart
TM airbag deactivation system..................... 59
Self-test ......................................................................... 59
Backrest, front seat.......................................................... 49
BAS (Brake assist system) ............................................ 212
Malfunction indicator lamp..................................... 227
Battery ............................................................................. 270
Battery recycling ....................................................... 271BATTERY/ALTERNATOR - malfunction and warning
messages ................................................................... 232
Block heater ................................................................... 209
BRAKE ASSIST - malfunction and
warning messages ........................................................ 233
Brake assist system (BAS) ............................................. 212
Malfunction indicator lamp .................................... 227
Brake fluid...................................................... 225, 316, 318
Capacity ...................................................................... 316
BRAKE FLUID - malfunction and
warning messages ........................................................ 234
BRAKE LINING WEAR - malfunction and
warning messages ........................................................ 234
Brake pad wear .............................................................. 234
Brake warning lamp ..................................................... 225
Brake fluid low ......................................................... 225
Brakes .................................................... 200, 202, 212, 216
Bulbs
See Replacing bulbs................................................. 277