Greetings,

Occasionally, I assist a few friends, who own repair shops in and around Los Angeles, with difficult/unusual problems. Recently, I was asked to look at a 6/1996 production (1997) C280 with an unusual problem.

This car would crank for approximately one second and stop cranking. Codes retrieved were P1570 DAS Fault. A second key was ordered prior to my involvement. The new key produced same results.

Upon initial inspection, all fuses (all 3 locations) were verified as intact. STAR diagnostics were used to examine the systems. All indications pointed to a bad DAS control module. On a 1997 W202. there are 2 possibilities for the DAS module in the 1997 model year. This had the smaller DAS that did not have the integrated RCL, (MBZ #210.820.32.26)

After the DAS was installed, the car started for about 3 seconds and died. It then continued the cycle of crank for approximately one second and then stops.

STAR was again used to check the actual values and a CAN fault was found in the DAS. I also noticed that door and trunk lock function had mysteriously ceased after the car died.

Inspection revealed that fuse #27 in the LF engine compartment had a hairline fracture that was visible only under magnification. Replacing this 15 amp fuse brought door locks back online and resulting in engine start every time.

It is unknown if the fuse was the cause of the issue, or it was the DAS module at fault all along, but we replaced the DAS anyway, since it isn't very expensive...less than $600.00 brand new from MBZ Fort Worth Texas.

Hope this information is helpful....

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1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



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