EBD (electronic brake forcedistribution)
Observe the "Important safety notes"
section.
EBD monitors and controls the brake pressure on the rear wheels to improve driving stability while braking.
WARNING 
If EBD has malfunctioned, the braking system
remains available with full brake boosting
effect. However, the rear wheels can still lock,
e.g. under full braking. This could cause you
to lose control of your vehicle and cause an
accident. You should therefore adapt your
driving style to the different handling
characteristics.
► Observe the notes on warning and indicator lamps as well as display messages.
See also:
Snow chains
For safety reasons, Mercedes-Benz
recommends that you only use snow chains
which have been specially approved for your
vehicle by Mercedes-Benz, or are of a
corresponding standard of quality.
...
Removing the mechanical key
•► Push release catch 1 in the direction of
the arrow and at the same time, remove
mechanical key 2 from the SmartKey. ...
Service for recovering a stolen vehicle
If your vehicle has been stolen:
Notify the police. The police will issue a numbered incident report.
This number will be forwarded to the Mercedes-Benz Customer Assistance
Center together wi ...