Remove/install electric drive control unit - AR08.20-P-0020MEX

ENGINE 780.009 in MODEL 451.391/491 

Drivetrain control unit 

Fig 1: Identifying Electric Drive Control Unit Remove/Install Components - Drivetrain Control Unit

Courtesy of MERCEDES-BENZ USA

	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Read out variant coding of drivetrain control unit (N127) using STAR DIAGNOSIS	When replacing the drivetrain control unit (N127).
		Connect up STAR DIAGNOSIS and read data from the drivetrain control unit (N127) into Star Diagnosis. : Transfer stored data into the new drivetrain control unit (N127).	AD00.00-P-2000-04MCC
2	Disconnect ground line of 12 V battery		AR54.10-P-0003MCC
3	Remove right side paneling in trunk		AR68.30-P-4800MEV
4	Release and disconnect Electrical connection (1) on drivetrain control unit (N127)
5	Release and disconnect Electrical connection (2) on drivetrain control unit (N127)
6	Release and disconnect Electrical connection (3) on drivetrain control unit (N127)
7	Unlock catch hooks (arrows) on bracket (4) and remove drivetrain control unit (N127) to the rear from bracket (4)
8	Install in the reverse order
9	Start up drivetrain control unit (N127) using Star Diagnosis
			AD00.00-P-2000-04MCC