Main remote control single lock with folding key (2 pcs)
1 - Remote control buttons
2 - Folding key release button
3 - Infrared emitter
4 - Control LED of the batteries
Spare remote control equipped with retractable key
1 - Remote control buttons
2 - Retractable key
All models discussed in this manual are equipped as standard with a single remote-controlled lock.
When buying a car, the owner is presented with two main remote controls (DU), equipped with folding keys and one spare remote control with a retractable key. The key included in the remote control is suitable for all locks used on the car.
Remote control (DU) allows activation of locks / alarms from a distance of up to 10 meters (depending on local conditions).
If the remote control is lost, the single lock should be recoded at a Mercedes-Benz service station - a replacement remote control can also be ordered there.
Remote control malfunctions can be caused by the following reasons:
- a) The key is in the ignition;
- b) The battery level of the remote control battery has dropped;
- c) The distance between the remote control and the car is more than 10 meters;
- d) Synchronization of the single lock system is broken.
Attention! Observe the following precautions when handling remote controls:
- a) Keep the remote control away from moisture!
- b) Do not drop or shake the remote control!
- c) Do not expose the remote control to direct sunlight for a long time and do not heat it above 60°C!
It is also possible to control the functioning of the lock actuators using a key switch mounted in the front section of the center console (see Vehicle equipment, arrangement of instruments and controls).
Automatic simultaneous locking of all car doors occurs when the speed of the car reaches a certain value, - unlocking any of the car doors from the inside will unlock the others.
Attention! If the doors are unlocked after the locks have been activated while driving using the single lock switch on the center console, the locks will remain open even after the vehicle is started again.
Attention! Automatic locking of the doors occurs when the left front wheel is rotated, when the ignition key is turned to position 2, which should be taken into account so as not to be left outside when pushing a stuck car!
Deactivation of the automatic door locking function while driving can be done by holding down the lower part of the single lock console switch button for approximately 5 seconds (see Vehicle equipment, arrangement of instruments and controls) with the ignition key turned to position 2.
The creators of a single lock provide a function of automatic unlocking of door locks in case of an emergency collision with excess of a predetermined level of overloads.
Rules for using the remote control/keys
Controlling the operation of lock activators
The remote control allows you to simultaneously unlock / lock the locks of all doors, the luggage compartment lid and the hatch cover.
The design of the remote control allows you to enable / disable the function of opening the driver's door. To activate the function, simultaneously press the and buttons and hold them down for about 5 seconds, the control LED should blink twice to confirm the function is enabled. The deactivation of the function is done in a similar manner.
When the driver's door unlocking function is disabled, pressing the button once will cause the activators of the locks of all doors, the luggage compartment lid and the fuel filler cap to be unlocked, accompanied by a single flashing of the direction indicators.
The locks are locked by pressing the button once and accompanied by three turns of the direction indicators.
Attention! If, after locking with the remote control, any of the car doors is opened from the inside, the other locks will remain locked.
When the driver unlock function is enabled, pressing the button once unlocks the driver's door and the fuel filler cap. Pressing the button twice unlocks all doors, the luggage compartment lid and the fuel filler cap, while the direction indicators flash once.
Attention! If none of the vehicle doors are opened after the locks are unlocked, they will automatically lock after about 40 seconds.
Using the button, the luggage compartment lid can be individually unlocked - the control LED built into the lid latch remote release switch should light up (see Vehicle equipment, arrangement of instruments and controls).
Attention! After releasing the latch, the luggage compartment lid folds up, so make sure that there is adequate free space!
Burying door glass and top hatch cover
Attention! The drive of windows and sunroof can only be controlled from the main remote control panels.
The design of the remote control allows you to close the left open door windows and the top hatch cover.
Point the remote with the emitter at the handle of one of the front doors of the car and press the button on the remote. After holding the button pressed for about 2 seconds, the drive of the lowered windows / sunroof cover is activated.
Attention! The range of the remote control in this mode, for security reasons, is much less than the standard 10 m.
Attention! If there is a danger that the hands of the remaining passengers in the car could be pinched by the glass or the hatch cover, immediately release the button on the remote control, if necessary, to lower the glass / open the sunroof, press the button - the opening process will start only if the corresponding element has not been fully opened.
Battery level control
Battery status is monitored by pressing any of the and buttons on the remote control and holding it down for more than 1 second, - short-term activation of the LED built into the remote control confirms that the batteries are in good condition. If the LED does not light up, replace the remote control batteries immediately.
Replacing the remote control batteries
Attention! Replacement batteries for the remote controls are always available from Mercedes-Benz Dealers.
Main console
To change the batteries of the main remote control, open the key built into it, then push up the access cover on the rear panel.
Install the replacement batteries with the positive side facing up, then securely snap the cover on and remove the key.
Spare remote
Push aside the access cover on the back of the console. Remove the used batteries and install replacement ones in their place.
Single Lock Synchronization
If the lock activators fail to operate from the remote control, it is necessary to synchronize the system. Point the remote at the car and briefly press any of the and buttons twice. Within the next 30 seconds, insert the key into the ignition switch and turn it to position 2.