2001 MERCEDES-BENZ CLK320 key battery

282 Electronic main key
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Insert mechanical key (4) in side opening (5) to open
latch. Press briefly (do not use mechanical key as lever)
to release battery compartment.
Remove mechanical key from side opening.
Carefully remove battery compartment in direction of
arrow (6).Change batteries (7), inserting new ones under contact
spring (8) with plus (+) side facing up.
Return battery compartment into housing until locked
in place and slide mechanical key back into electronic
main key.
P80.35-2025-26
5
4
6
P80.35-2027-26
78

283 Electronic main key
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index Important!
Batteries contain materials that can harm the
environment if disposed of improperly. Recycling of
batteries is the preferred method of disposal. For
disposal, please follow manufacturer’s recommendation
on battery package.
Replacement Battery:
Lithium, type CR 2025 or equivalent.Synchronizing remote control
The remote control may have to be resynchronized, if
the vehicle cannot be locked or unlocked.
To synchronize insert electronic key in steering lock.
The remote control should once again be operational.

315 Index
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car careIndex
KKeys, vehicle ..................................................................... 24LLamps, exterior
Fog lamps ....................................................................114
Headlamp, adjusting ................................................278
Headlamps ..................... 114, 239, 240, 274, 278, 292
Low and high beam .......................................... 117, 275
Parking lamp ..............................................................114
Parking lamps ...........................................................275
Replacing bulbs .........................................................273
Side marker lamp, front ...........................................277
Standing lamp ............................................................114
Standing lamps ..........................................................275
Taillamp assemblies ......................................... 114, 276
Turn signal lamp ............................................... 117, 275
Layout of poly-V-belt drive ............................................298
LIGHT SENSOR - malfunction
and warning messages ............................................240
Lighter ............................................................................. 158
LIGHTING SYSTEM - malfunction
and warning messages ............................................239Limp home mode (Automatic transmission) ............. 199
Loading instructions ...................................................... 160
Locking and unlocking .................................................... 30
Low engine coolant level warning .............................. 237
MMaintenance ...................................................................175
Malfunction and indicator lamps
in the instrument cluster ........................................ 226
Malfunction and warning messages ...........................231
ABS-SYSTEM ............................................................. 234
BATTERY/ALTERNATOR ......................................... 233
BRAKE ASSIST ......................................................... 234
BRAKE FLUID ........................................................... 235
BRAKE LINING WEAR ............................................ 235
COOLANT (coolant level) ........................................ 237
COOLANT TEMP. (coolant temperature) .............. 238
DISPLAY DEFECTIVE (engine control unit) ........ 232
DISPLAY DEFECTIVE (several systems) ............... 232
ELEC. STABIL. PROGR. ............................................ 242
ENGINE FAN ............................................................. 236
ENGINE OIL LEVEL .................................................. 241
LIGHT SENSOR ......................................................... 240
LIGHTING SYSTEM .................................................. 239

317 Index
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car careIndex Power windows ............................................................... 146
Express opening and closing .................................. 147
Opening and closing .................................................. 32
Synchronizing ........................................................... 147
Problems with your vehicle ........................................... 14
Product information .......................................................... 7
RRadio transmitters ......................................................... 174
Rain sensor ......................................................................118
Rear seats
Split folding backrest ............................................... 159
Rear view mirrors
Exterior ......................................................................... 79
Inside ............................................................................ 78
Rear window defroster .................................................. 124
Rear window sunshade ................................................. 151
Remote control ................................................................. 28
Battery replacement ................................................. 281
REMOVE KEY - malfunction
and warning messages ............................................242
Replacing bulbs ..............................................................273
Replacing wiper blade insert .......................................285Reporting Safety Defects ................................................. 15
Reserve key ....................................................................... 26
Residual engine heat utilization (REST) ....................125
Roadside assistance ......................................................... 10
Roadside assistance call
See Tele Aid ...............................................................178
Roof rack ......................................................................... 287
SSafety guidelines for the seat belt, emergency
tensioning retractor and airbag ................................72
Seat belts ........................................................................... 57
Fastening ......................................................................59
Seat belt nonusage warning system .........................58
Unfastening .................................................................. 61
Warning lamp ........................................................... 230
Seat belts and integrated restraint system .................. 57
Service indicator
See Flexible service system (FSS) .......................... 109
Setting the audio volume ..............................................108
Shelf below rear window ............................................. 246
Side marker lamp .......................................................... 277
Ski sack ........................................................................... 168