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Home >> Mercedes Benz >> 2021 >> A220 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Electrical System - Body - 177 Chassis (2 Of 4) >> Testing & Repair >> Remove/Install Sound System Amplifier Control Unit >> Remove/Install Sound System Amplifier Control Unit - AR82.62-P-7720MFB
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Remove/Install Sound System Amplifier Control Unit - AR82.62-P-7720MFB

Model 118, 177, 247.0/7 

up to model year 2021 

with code 810 (Premium sound system) 

except code 853 ("Midline" sound system) 

Fig 1: Sound System Amplifier Control Unit Components Location - Model 177 Up To Model Year 2021 With Code 810, Except Code 853
G15492387Courtesy of MERCEDES-BENZ USA

Shown on model 177.0 

WARNING Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. No parts of the body or limbs should be within the operating area when the components are moving. AS00.00-Z-0011-01A
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Notice  Notes on avoiding damage to optical fibers during repair work   AH82.60-P-0001-05AK
  Notes on HANDS-FREE ACCESS   AH80.61-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).    
2.1 Remove load compartment floor. Model 118, 177.1/9
up to model year 2021
with code 810 (Premium sound system)
except code 853 ("Midline" sound system)
 
2.2 Remove rear-end center-section trim. Model 177.0, 247.0/7
up to model year 2021
with code 810 (Premium sound system)
except code 853 ("Midline" sound system)
 
    Model 177.0
up to model year 2021
with code 810 (Premium sound system)
except code 853 ("Midline" sound system)
AR68.30-P-4786MFA
    Model 247.0/7
up to model year 2021
with code 810 (Premium sound system)
except code 853 ("Midline" sound system)
AR68.30-P-4786MFV
3 Remove nuts (1).    
4 Lift sound system amplifier control unit (N40/3) with frame (2) and connected electric lines and turn so that the electrical connectors and screws (3) are accessible. NOTES
Do not crush or kink or subject lines to tension This will result in damage to the lines which may impair their functional capability.
 
5 Release and disconnect electrical connectors. IMPORTANT The number of electrical connectors varies according to vehicle equipment.  
6 Remove screws (3) and remove sound system amplifier control unit (N40/3) from frame (2).    
7 Install in the reverse order.    
8 Carry out commissioning of sound system amplifier control unit (N40/3). If sound system amplifier control unit (N40/3) is replaced.  
      AD00.00-P-2000-06MFA