Retrofit Audio 20 CD Radio - AN82.60-P-0007CLW

Model 205.3 

with code 3U1 (Head unit ECE/ROW) 

with code 520 (Audio 20 USB) 

Courtesy of MERCEDES-BENZ USA

	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove
1	Remove Audio 20 USB head unit (A26/17)
			AR82.85-P-1100LW
		The head unit (A26/17) Audio 20 USB is no longer required.
2	Remove upper control panel control unit
			AR54.21-P-1262LW
		The upper control panel control unit is no longer required.
	Install
3	Install new upper control panel control unit
			AR54.21-P-1262LW
4	Install Audio 20 CD head unit (A26/17)
			AR82.85-P-1100LW
	Update Vehicle Documentation (VeDoc)
5	Delete special equipment in on-line vehicle data card	CODE 520 (Audio 20 USB)
6	Enter special equipment in on-line vehicle data card	Code 522 (Audio 20 radio) and code 818 (CD single drive).
7	Attach note "Audio 20 radio retrofitted as per " under field organization texts to design group 82		AN82.60-P-0007CLW
8	Connect diagnostic system and select vehicle via the vehicle identification number (VIN)
			AD00.00-P-2000-04B
9	Carry out variant coding using software calibration number (SCN)	Electronic ignition lock control unit and head unit.
10	Disconnect diagnostic system
			AD00.00-P-2000-04B
	Check
11	Perform function test	See Owner's Manual.