Drive Authorization System (DAS)

NOTE: Diagnostic information applies to 2001-02 models with 4.3L, 5.0L and 5.5L engine (No. 113), equipped with Motor Electronics Sequential Fuel Injection (ME-SFI). Diagnostic information in this article does not apply to all models with engine number 113. For diagnostic information availability, see MODEL IDENTIFICATION (2000-02) table.

DAS is activated from DAS control module through the Controller Area Network (CAN) data bus to the ME-SFI control module. When DAS is activated, ME-SFI control module renders fuel injection system inoperative. See DAS VERSION table to identify model/version usage.

DAS VERSION

Model	DAS Version
CLK430, CLK55, E430, E55, ML430, S430, S500 & SL500	DAS 3

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. The ME-SFI control module and DAS control module are "married" to one another with identification codes. Identification codes cannot be erased. Switching ME-SFI control module or DAS modules form one vehicle to another is not possible. If an exchange ME-SFI control module is installed for test purposes, up to 40 start attempts can be performed before ME-SFI control module and DAS control modules "marry" to one another. Prior to performing first engine start, ME-SFI control module must be version coded to vehicle using scan tool. See VERSION CODING .