Mercedes-Benz 300SD 1981 Owner's Manual page 16

Keys Doors
Master Key — square head -
locks on the car.
Supplementary Key— rounded head
— fits only the door locks and the
steering lock. This key is intended to
be used whenever the car is left with
an attendant. Be sure to lock glove
compartment and trunk with the
master key.
14
-fits all Flat Key
The flat key fits all vehicle
locks. We recommend that
you carry the flat key with
you and keep it in a safe
place so that it is always
handy, if needed (e.g. in
your wallet). Never leave the flat key in
the vehicle.
Obtaining Replacement Keys
Replacement keys can be obtained
only via MERCEDES-BENZ service
stations. If the keys are lost, assist­
ance is rather time consuming and
expensive.