Mercedes-Benz S 350 Owner's Manual page 511

Problem
The battery check lamp on the key does
not light up when tested.
You have lost a key.
You have lost the emergency key element.
The key cannot be turned in the ignition
lock.
Possible cause/consequence
The key batteries are discharged.
The key has been in position 0 for a con-
siderable time.
Practical advice
Troubleshooting
Suggested solutions
Change the batteries ( page 499).
Have the key cancelled at a
Mercedes-Benz Service Centre.
Report the loss immediately to the vehi-
cle insurers.
If necessary, have the manual locks
changed too.
Report the loss immediately to the vehi-
cle insurers.
If necessary, have the manual locks
changed too.
Remove the key and reinsert it into the
ignition lock again.
Check the starter battery and charge it
if necessary.
Switch on the ignition.
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