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

Model 213 (except 213.061/064/261/264) as of 6/1/17 with code B63 (Engine sound via speakers) 

Model 213.061/064/261/264 

Courtesy of MERCEDES-BENZ USA

Shown on model 213.0 with code 811 (Advanced Sound System) and code 881 (Remote trunk closing) 

Courtesy of MERCEDES-BENZ USA

	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
	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
	Remove/install
1	Perform commissioning of engine sound control unit (N40/1)	When replacing the engine sound control unit (N40/1).
			AD00.00-P-2000-04B
2	Switch off ignition and store transmitter key outside of transmission range (min. 2 m)
3.1	Remove left luggage compartment lining at side	Model 213.0 (except 213.061/064) as of 6/1/17, 213.1 as of 6/1/17 with code B63 (Engine sound via speakers) Model 213.061/064	AR68.30-P-4800LWE
3.2	Remove left side load compartment lining	Model 213.2 (except 213.261/264) as of 6/1/17 with code B63 (Engine sound via speakers) Model 213.261/264	AR68.30-P-1185LWE
4	Remove subwoofer from trunk	Model 213.0 (except 213.061/064) as of 6/1/17, 213.1 as of 6/1/17 with code 811 (High-End sound system) with code B63 (Engine sound via speakers) Model 213.061/064 with code 811 (High-End sound system)	AR82.62-P-7841LWE
5	Remove bolts (1), unscrew nuts (2) and remove bracket (3) with sound system control unit and place to one side	Model 213 (except 213.061/064/261/264) as of 6/1/17 with code 810 (Premium sound system) with code B63 (Engine sound via speakers) Model 213.0 (except 213.061/064) as of 6/1/17, 213.1 as of 6/1/17 with code 811 (High-End sound system) with code B63 (Engine sound via speakers) Model 213.061/064/261/264 with code 810 (Premium sound system) Model 213.061/064 with code 811 (High-End sound system) Do not separate the electrical connectors.
6	Disconnect electrical connection (9)	Model 213.0 (except 213.061/064) as of 6/1/17, 213.1 as of 6/1/17 with code 881 (Remote boot-lid closing) with code B63 (Engine sound via speakers) Model 213.061/064 with code 881 (Remote boot-lid closing)
7	Unscrew nut (4), remove bolts (5) and remove bracket (6) with control units, then place to one side	The engine sound control unit (N40/1) is located on the rear of the bracket (6). Do not separate the electrical connectors. The number of control units installed on the bracket (6) can vary depending on the vehicle equipment installed.
8	Remove bolts (7)
9	Disconnect electrical connector (8) and remove engine sound control unit (N40/1)
10	Install in the reverse order
	Normalizing
11	Close trunk lid manually	Model 213.0 (except 213.061/064) as of 6/1/17, 213.1 as of 6/1/17 with code 881 (Remote boot-lid closing) with code B63 (Engine sound via speakers) Model 213.061/064 with code 881 (Remote boot-lid closing)
12	Actuate driver trunk lid control button in driver door paneling to "Open" position until trunk lid reaches upper limit stop	Model 213.0 (except 213.061/064) as of 6/1/17, 213.1 as of 6/1/17 with code 881 (Remote boot-lid closing) with code B63 (Engine sound via speakers) Model 213.061/064 with code 881 (Remote boot-lid closing)
13	Actuate driver trunk lid control button in driver door paneling again for 4 s in "Open" position	Model 213.0 (except 213.061/064) as of 6/1/17, 213.1 as of 6/1/17 with code 881 (Remote boot-lid closing) with code B63 (Engine sound via speakers) Model 213.061/064 with code 881 (Remote boot-lid closing)