S 600 (140.057) V12-6.0L (120.982) (1998)
A number of control modules have two multipoint connector strips, in which case the connector for the second strip has a darker color like the marking
on the control module.
Module box/control module box pin assignment
see Wiring Diagram.
Commercially available tester
Quiescent current retention unit
e.g. Hans Zeheter CMP 12.2
Special tool