S 600 Coupe (140.076) V12-6.0L (120.982) (1997)
Amplifier: Service and Repair
Removing and Installing Amplifier Control Module
Quiescent current retention unit
disconnect, connect.
Ground cable at battery
disconnect, connect.
Commercially available tester
Quiescent current retention unit
e.g. Hans Zeheter CMP 12.2