Mercedes-Benz COMAND Operator's Manual page 103

Telephone*
Telephone operation
The PIN protects the telephone against un-
authorized use. Your PIN is found in the
telephone service provider's documenta-
tion.
Commit your PIN to memory.
Most telephone functions are not available
before entering the PIN.
102
Press the corresponding number key
 -  for each digit.
In case of erroneous entry, you can de-
lete the last or more digits.
Delete
Press the soft key as often as
required.
Once all digits have been entered,
OK
press the soft key.
If the input is correct, the telephone
will log itself into the network.
i
The telephone cannot be used before it
is logged-in.
If the input is incorrect, message
Wrong PIN number
will appear briefly.
Re-enter the PIN.
After three incorrect entries, the SIM
SIM card
card is blocked. Message
blocked
will appear briefly.
The PUK has to be entered.
( Telephone Operation Guide)