Remove/Install Multimedia Connection Unit Control Unit Under Front Seat - AR54.21-P-0124S

Model 223 

with code 72B (USB package) 

except code 224 (Individual rear seats) 

Fig 1: Multimedia Connection Unit Control Unit Under Front Seat Components Location - Model 223 With Code 72B Except Code 224 (Shown With Code 582)

Courtesy of MERCEDES-BENZ USA

Shown with code 582 (Air conditioning system in rear passenger compartment) 

Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Remove left front seat.		AR91.10-P-1000S
2	Remove front left floor covering.	Model 223.### 2# with code 72B (USB package) except code 224 (Individual rear seats)	AR68.80-P-0008S
		Model 223.### 1# with code 72B (USB package) except code 224 (Individual rear seats)	AR68.80-P-0007S
3	Unclip air ducting cover (1).
4	Detach rear passenger compartment floor covering (2) and fold backward.
5	Remove air ducts (3).	Model 223 with code 72B (USB package) except code 224 (Individual rear seats) except code 582 (Air conditioning, rear)
		Only one air duct (3) is installed.
6	Remove ground lines (4) from front left seat crossmember ground point (W18).
	Notes on the use of paint scraping nuts on ground connections		AH00.19-P-1000-20A
		Left front seat cross member ground point	*BA00.19-P-1007-01N
7	Disconnect electrical connectors (5).
8	Remove nuts (6).
9	Remove multimedia connection unit (A90/8).
10	Install in the reverse order.
11	Commission multimedia connection unit (A90/8).	When replacing multimedia connection unit (A90/8).
			AD00.00-P-2000-06FR