Drive Authorization System (DAS)
DAS is activated from DAS control module through the Controller Area Network (CAN) data bus to the Engine Control Module (ECM). When DAS is activated, ECM renders fuel injection system inoperative. See DAS VERSION table to identify model/version usage.
| Year | Model | DAS Version |
|---|---|---|
| 1997 | C280, C36, E320 & SL320 | DAS X |
| 1997-99 | S320 | DAS X |
| 1998-99 | E320 | DAS 3 |
DAS X activation or deactivation is accomplished with a transponder in the ignition key. When ignition is turned to lock, DAS X control module is activated. When electronic key is inserted into the ignition lock, DAS X control module is activated. Locking or unlocking vehicle using mechanical key has no effect on DAS.
DAS 3 activation or deactivation is accomplished with the electronic key. When electronic key is inserted into the ignition lock, DAS 3 control module is activated. Locking or unlocking vehicle using mechanical key has no effect on DAS.
On DAS systems, the Engine Control Module (ECM) and DAS control module are "married" to one another with identification codes. Identification codes cannot be erased. Switching ECM or DAS modules form one vehicle to another is not possible. If an exchange ECM is installed for test purposes, up to 40 start attempts can be performed before ECM and DAS control modules "marry" to one another. Prior to performing first engine start, ECM must be version coded to vehicle using scan tool. See VERSION CODING .