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Home >> Mercedes Benz >> 2019 >> C300 4Matic, 2D Convertible >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Electrical System, Equipment & Instruments - 205 Chassis 3 Of 6 >> Testing & Repair >> Remove/Install Engine Sound Control Unit - AR54.21-P-0024LWX

Remove/Install Engine Sound Control Unit - AR54.21-P-0024LWX

Model 205, 253 

with code B63 (Engine sound via speakers) 

Fig 1: Engine Sound Control Unit Components Location - Model 205 With Code B63; Shown On Model 253
G14201304Courtesy of MERCEDES-BENZ USA

Shown on model 253 

  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Perform commissioning of engine sound control unit (N40/1) When replacing the engine sound control unit (N40/1).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04B
2 Switch off ignition and store transmitter key outside of transmission range (min. 2 m)    
3 Remove front floor covering in front passenger footwell   AR68.20-P-2070LW
4 Unscrew nuts (2) and remove footrest (1)    
5 Disconnect electrical connection (3)    
6 Unscrew nuts (4), unhook engine sound control unit (N40/1) from bracket and remove    
7 Install in the reverse order