2018-2026 Mercedes A Class 4 Door Opening and closing -> Anti-theft protection User Manual
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Opening and closing -> Anti-theft protection for Your Mercedes A Class 4 Door Third Generation (2018-2026)

Opening and closing  
The sliding sunroof cannot be closed and you can- Resetting the sliding sunroof and the roller sun-  
84  
not operational. Contact an authorized  
Mercedes-Benz Center or call  
1-800-FOR-MERCedes (in the USA) or  
1-800-387-0100 (in Canada).  
not see the cause.  
blind  
#
%
The term "sliding sunroof" also refers to the  
panorama roof with power tilt/sliding panel.  
Pull and hold the 3 button little by little  
until the sliding sunroof is fully closed.  
#
#
If the sliding sunroof is obstructed during closing  
and reopens again slightly:  
Pull and hold the 3 button little by little  
until the roller sunblind is fully closed.  
ATA (antti-theꢀ aalarm system)  
Function of thee ATA system  
#
Immediately aꢀer automatic reversing, pull  
Use automatic operation to fully open and  
then close the sliding sunroof.  
and hold the 3 button down again to the  
point of resistance until the sliding sunroof is  
closed.  
The sliding sunroof will be closed with  
increased force.  
If the ATA system is armed, a visual and audible  
alarm is triggered in the following situations:  
R
When a door is opened  
Anti-theꢀ prrotection  
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When the trunk lid is opened  
Function of thhe immobilizer  
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When the hood is opened  
The immobilizer prevents your vehicle from being  
started without the correct SmartKey.  
If the sliding sunroof is obstructed again and  
opens again slightly:  
R
When the interior motion sensor is triggered  
(/ page 86)  
The immobilizer is automatically activated when  
the vehicle is switched oꢁ, and deactivated when  
the vehicle is switched on.  
#
Repeat the previous step.  
The sliding sunroof will be closed again with  
increased force.  
R
When the tow-away alarm is triggered  
(/ page 85)  
Vehicles with a panorama roof with power tilt/  
sliding panel: The sliding sunroof or the roller sun-  
blind is not operating smoothly.  
When leaving the vehicle, always take the Smart-  
Key with you and lock the vehicle. Anyone can  
start the vehicle if a valid SmartKey has been leꢀ  
inside the vehicle.  
The ATA system is armed automatically aꢀer  
approximately ten seconds in the following situa-  
tions:  
#
Reset the sliding sunroof and the roller sun-  
blind.  
R
Aꢀer locking the vehicle with the SmartKey  
%
In the event the engine cannot be started (yet  
the vehicle’s battery is charged), the system is  
R
Aꢀer locking the vehicle using KEYLESS-GO  
Opening and closing  
When the Mercedes‑Benz emergency call sys- An audible and visual alarm is triggered if an alter-  
85  
%
%
tem is active and the alarm stays on for more  
than 30 seconds, a message is automatically  
sent to the Customer Assistance Center  
(/ page 247).  
ation to your vehicle's angle of inclination is  
detected while the tow-away alarm is armed.  
The tow-away alarm is automatically armed aꢀer  
approximately 60 seconds:  
In the case of severe battery discharging, the  
anti-theꢀ alarm system is automatically deac-  
tivated to facilitate the next engine start.  
R
Aꢀer locking the vehicle with the SmartKey  
R
Aꢀer locking the vehicle using KEYLESS-GO  
The tow-away alarm is only armed when the fol-  
lowing components are closed:  
Deactivating the ATA  
#
Press the Ü, ß or p button on the  
SmartKey.  
R
Doors  
R
Trunk lid  
or  
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Press the start/stop button with the SmartKey  
in the stowage compartment (/ page 129)  
The tow-away alarm is automatically deactivated:  
R
Aꢀer pressing the Ü or p button on the  
SmartKey  
Indicator lamp 1 ꢂashes when the ATA system is  
armed.  
Deacttivating the alarm using KEYLESS-GO  
R
Aꢀer pressing the start/stop button with the  
SmartKey in the marked space (/ page 129)  
#
Grasp the outside door handle with the Smart-  
Key outside the vehicle.  
The ATA system is deactivated automatically in the  
following situations:  
R
Aꢀer unlocking the vehicle using KEYLESS-GO  
R
Aꢀer unlocking the vehicle with the SmartKey  
R
When using HANDS-FREE ACCESS  
Function of the tow-awway alarm  
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Aꢀer unlocking the vehicle using KEYLESS-GO  
%
This function may not be available in all coun-  
tries.  
Information on collision detection on a parked  
vehicle (/ page 153).  
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Aꢀer pressing the start/stop button with the  
SmartKey in the marked space (/ page 129)  
Opening and closing  
86  
R
Arming//disarming the tow--away alarm  
Multimedia system:  
The interior motion sensor is activated automati-  
cally aꢀer approximately ten seconds:  
When a panoramic sliding sunroof is open  
R
Aꢀer locking the vehicle with the SmartKey  
Arming/deactivating thhe interiorr motion sensor  
Multimedia system:  
4
5
5
©
Settings  
Quick Access  
R
Aꢀer locking the vehicle using KEYLESS-GO  
#
Arm or disarm Tow-away Protection.  
4
5
5
The interior motion sensor is only activated when  
the following components are closed:  
©
Settings  
Quick Access  
The tow-away alarm is armed again in the follow-  
ing cases:  
#
Activate or deactivate Interior Motion Sensor.  
R
Doors  
R
The vehicle is unlocked again.  
The interior motion sensor is activated again in  
the following cases:  
R
Trunk lid  
R
A door is opened.  
R
The vehicle is unlocked again.  
R
The vehicle is locked again.  
The interior motion sensor is automatically deacti-  
vated:  
R
A door is opened.  
%
If quick access is unavailable, select the Vehi-  
cle submenu in the Settings main menu to  
arm or disarm the tow-away alarm.  
R
Aꢀer pressing the Ü or p button on the  
SmartKey  
R
The vehicle is locked again.  
%
If quick access is unavailable, select the Vehi-  
cle menu under Settings to activate or deacti-  
vate the interior motion sensor.  
R
Aꢀer pressing the start/stop button with the  
SmartKey in the marked space (/ page 129)  
Function of tthe interior motion sensor  
R
Aꢀer unlocking the vehicle using KEYLESS-GO  
%
This function may not be available in all coun-  
tries.  
R
When using HANDS-FREE ACCESS  
The following situations can lead to a false alarm:  
When the interior motion sensor is activated, a  
visual and audible alarm is triggered if movement  
is detected in the vehicle interior.  
R
When there are moving objects such as mas-  
cots in the vehicle interior  
R
When a side window is open  

Related Topics

Opening and closing
SmartKey Doors Trunk Side windows Sliding sunroof

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