Drive Authorization System (DAS)

WARNING: This page is about a different car, the 1997 Mercedes-Benz SL320, 1997 Mercedes-Benz E320, 1997 Mercedes-Benz C36, and 1997 Mercedes-Benz C280. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This diagnostic information applies to 1997-99 models with engine 104 (inline 6-cylinder) equipped with Motor Electronics Sequential Fuel Injection (ME-SFI).

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.

DAS VERSION

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 .