Applying/releasing the electric parking brake manually
WARNING Risk of accident and injury due to children left unattended in the vehicle
If you leave children unattended in the vehicle, they may be able to set the vehicle in motion, for example by:
releasing the parking brake.
shifting the manual transmission into idle position.
starting the engine.
In addition, they may operate vehicle equipment and become trapped.
Never leave children and animals unattended in the vehicle.
When leaving the vehicle, always take the key with you and lock the vehicle. This also applies to the Digital Vehicle Key if the "Digital Vehicle Key" function is activated via Mercedes me connect.
WARNING Risk of accident and injury due to children left unattended in the vehicle
If children are left unattended in the vehicle, they could:
operate vehicle equipment and become trapped, for example.
In addition, children could also set the vehicle in motion, for example, by:
releasing the parking brake.
shifting the automatic transmission out of park position
. starting the engine.
Never leave children and animals unattended in the vehicle.
When leaving the vehicle, always take the key with you and lock the vehicle. This also applies to the digital vehicle key if the "Digital Vehicle Key" function is activated via Mercedes me connect.
Applying
Push handle 
.
. The red 
indicator lamp appears in the instrument cluster.
The electric parking brake is only securely applied if the indicator lamp is lit continuously.
Releasing
Switch the ignition on.
Pull handle .
. The red indicator lamp in the instrument cluster goes out.