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This topic discusses the types of alarm systems installed and Immobilisers CB model W140 – S class in 1991 and 1998.

Indicated ways of learning a new remote, and various functional systems that have CB, alarm and immobilizer …..
Remote alarm / central locking

Operation of the system

Infrared remote control – to 08/95

• System LED is located on the center console (with equipment)
Infrared receiver is in the handle / tailgate.
• When you lock the car: Red LED in door handle / boot flash.
• When you unlock the car: Green LED in the door handle / boot flash.
Alarm system (with equipment):
• Enable 15 seconds after locking the car with the remote key.
• LED flashes continuously when the system is activated.
• When you lock the car: Hold down the button Lock / UnLock remote key – Close the windows.
• When you unlock the car: Hold down the button Lock / UnLock remote key – open windows.
Note: The remote control key must be directed to the infrared receiver in the driver’s door handle to open or close the windows.

Infrared remote control – from 09/95 to 05/97

• System LED is located on the center console (with equipment)
Infrared receiver is in the rearview mirror at the gym.
• When you lock the car: Red LED flashes the mirror.
• When you unlock the car: Green LED flashes the mirror.
Alarm system (with equipment):
• activated after locking the car with the remote key.
• flashing continuously when the system is activated.
• When you lock the car: Hold down the button Lock / UnLock remote key – Close the windows.
• When you unlock the car: Hold down the button Lock / UnLock remote key – open windows.
Note: The remote control key must be directed to the infrared receiver in the rearview mirror at the gym to open or close the windows.
• If both LEDs are blinking: battery in the remote key is empty or there is a failure in the system

Radio-frequency remote control – after 06/97

• LED system in the switch to disable the anti-withdrawal slope detector volume.
• Pressing the Lock key on the remote activated alarm system and lock all doors and fuel cap.
• The indicator light will flash three times.
• LED flashes continuously when the system is activated.
• To enable / disable the system altogether (GLOBAL) Lock:
• Press and hold the Lock and UnLock simultaneously for 5 seconds.
General (GLOBAL) lock is activated:
• Pressing UnLock button remote key again deactivates the alarm system and unlock the doors and trunk.
• The indicator light will blink once.
General (GLOBAL) lock is disabled:
• Pressing UnLock button remote key twice deactivate the alarm system and unlock the driver’s door and the fuel filler cap.
• The indicator light will blink once.
• Pressing the button twice on the remote UnLock key disables the alarm system and unlock the doors and trunk lid.
• The system will automatically lock all doors when the car reaches a speed of about 15 km / h (10 mph) (if the function is selected)
• If the car is unlocked and doors or the trunk are open till 40 seconds, lock will be activated again.
• When locking the car: Retention Lock button on the remote key will close the window.
• When unlocking the car: Keeping UnLock button on the remote key to open the windows.

Note: The remote control key must be directed to the infrared receiver in the handle of the driver’s door when you open or close the windows. IR port is only for this function, the alarm / central locking.

• the function of the alarm / central locking can be set using diagnostic equipment.

Synchronization

When?

• The remote is pressing the key repeatedly when the car is out of range and system becomes inoperative.
• Rechargeable Remote Key not changed for 1 minute.
• The remote key is new or replaced.

How – infrared remote control – to 08/95

• Use the infrared receiver in the handle of the door or shtshofyorskata this button to trunk
• Point the remote at the receiver of the key.
• Press the Lock / UnLock.
• After 30 seconds: manually unlock or lock the car using the door lock / trunk.
• The remote control key must now work with the system. If the system does not work, check the programming.

How – infrared remote control – from 09/95 to 05/97

• Infrared receiver is in the rearview mirror at the gym.
• Point the remote control key to power.
• Press the button twice Lock / UnLock.
• After 30 seconds: Turn the ignition key to position II.
• The remote control key must now work with the system. If the system does not work, check the programming.

How – Radio-frequency remote – after 06/97

• Point the remote key for the car.
• Double-click the button Lock / UnLock.
• After 30 seconds: Turn the ignition key to position II.
• The remote control key must now work with the system. If the system does not work, check the programming.

Programming

When?

• The remote key is new or replaced.
• Damage to the system.

How?

• The remote control key can be programmed only with the use of diagnostic equipment.

How to replace battery
Immobilizer

System operation – up to 05/97 (with equipment)

• The system is activated 15 seconds after locking the car.
• LED flashes continuously when the system is activated.

System operation – after 06/97

• activated after removing the ignition key.

Programming

How?

• Immobilizer can only be programmed using diagnostic equipment.

Source: Mercedes Benz W140 (1991-1998) – alarm, central locking, immobilizer information | W140 information


So according to the information i find above, i've got some question. So it means from 09/95 to 05/97 W140 don't have IR receiver in the door handles and trunk lid or they do, but they just add it in the rear view mirror? i know after 06/97 there is no more IR remote control it is replaced with radio-frequency remote control

i've do some research but still confuse, so please if you guys own/know information about W140 alarm remote pls tell me and thanx
 
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