2001 Mercedes-Benz CLK-Class master key

mercedes-benz
clk-class

#1
                The Problem

1- The master key does not open the doors or the trunk.
2- when I put the key in the starter (ignition) it does not turn, and I can not start the engine and it makes a sign in the front (remove the key)


#2

The battery in the master key has gone dead, the security system cannot identify the key as correct so won’t allow you to start the car. Replace the battery.