Problem
Possible causes/consequences and
M
M
Solutions
R
The SmartKey is faulty.
#
Activate the SmartKey functions (
/
page 63).
#
Check the battery using the battery check lamp and replace if necessary (
/
page 63).
#
Use the emergency key to unlock or lock the vehicle (
/
page 63).
#
Have the vehicle and SmartKey checked at a qualified specialist workshop.
Activating/deactivating the automatic lock‐
ing feature
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn‐
ing faster than walking pace.
#
To activate: press and hold button
2
for
approximately five seconds until an acoustic
signal sounds.
#
To deactivate: press and hold button
1
for
approximately five seconds until an acoustic
signal sounds.
When the vehicle is locked automatically, the
indicator lamp in button
2
lights up.
In the following situations, there is a danger of
being locked out when the function is activated:
R
While the vehicle is being tow started/
pushed.
R
If the vehicle is being tested on a roller dyna‐
mometer.
68 Opening and closing
Summary of Contents for A-Class 2020
Page 7: ......
Page 8: ...Left hand drive vehicles 6 At a glance Cockpit ...
Page 10: ...Q Electric parking brake 155 R Light switch 112 8 At a glance Cockpit ...
Page 11: ......
Page 12: ...Instrument Display standard 10 At a glance Warning and indicator lamps ...
Page 14: ...12 At a glance Overhead control panel ...
Page 16: ...14 At a glance Door control panel and seat adjustment ...