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

Model 253.9 

with code 3U1 (Headunit europe/CIS-states/Monoglei) 

with code 520 (Audio 20 USB) 

Shown on model 205 

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)
		The head unit (A26/17) Audio 20 USB is no longer required.	AR82.85-P-1100LW
2	Remove upper control panel control unit
		The upper control panel control unit is no longer required.	AR54.21-P-1262LW
	Install
3	Install head unit (A26/17) Audio 20 radio
			AR82.85-P-1100LW
4	Install new upper control panel control unit
			AR54.21-P-1262LW
	Update Vehicle Documentation (VeDoc)
5	Delete special equipment from online vehicle data card	CODE 520 (Audio 20 USB)
6	Enter special equipment in on-line vehicle data card	Code 522 (Audio 20 radio)  Code 818 (Single CD drive)
7	Attach note "Audio 20 radio retrofitted as per AN82.60-P-0007LWG" under field organization texts to design group 82
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 switch control unit  Head unit
10	Carry out variant coding using software calibration number (SCN)	Model 253.9 with code 218 (Reversing camera) Backup camera control unit
11	Carry out variant coding using software calibration number (SCN)	Model 253.9 with code 501 (360° camera) 360° camera control unit
12	Disconnect diagnostic system
			AD00.00-P-2000-04B
	Check
13	Perform function test	See Owner's Manual.