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Home >> Mercedes Benz >> 2021 >> A220 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Accessories Control 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-7720MFA
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Remove/Install Sound System Amplifier Control Unit - AR82.62-P-7720MFA

Model 118, 177, 247 

up to model year 2021 

with code 853 ("Midline" sound system) 

Fig 1: Sound System Amplifier Control Unit Components Location - Model 177 Up To Model Year 2021 With Code 853 (Shown On Model 177.0)
G15492386Courtesy of MERCEDES-BENZ USA

Shown on model 177.0 with code 853 ("Midline" sound system) 

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  Notes on avoiding damage to optical fibers during repair work   AH82.60-P-0001-05AK
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  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 (1). Model 118, 177, 247.0/7
up to model year 2021
with code 853 ("Midline" sound system)
Model 247.6
up to model year 2021
with code 853 ("Midline" sound system)
except code 847 (3rd seat row)
 
2.2 Remove right rear seat of 3rd seat row. Model 247.6
up to model year 2021
with code 847 (3rd seat row)
with code 853 ("Midline" sound system)
 
      AR91.12-P-0007MFX
3 Unclip cover (2) at catches (3). If installed.  
4 Release and disconnect electrical connector (4).    
5 Operate catch (5) and remove sound system amplifier control unit (N40/3).    
6 Install in the reverse order.    
7 Carry out commissioning of sound system amplifier control unit (N40/3). If sound system amplifier control unit (N40/3) is replaced.  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06MFA