300CD (123.153) L5-3.0L DSL Turbo (617.952) (1982)
Standby Power Supply: Description and Operation
Design: The reserve power source, used until 9/87, is located in a separate housing connected with the control unit by means of a cable harness. As of
9/87 the function of the reserve power source is performed by the SRS control unit.
Method of Operation: Should the vehicle battery fail immediately in the event of a collision, the control unit and the ignition circuits are supplied
from a reserve power source.
Failures of the reserve power source are indicated by the warning lamp in the instrument cluster.