Retrofitting wiring harness of automatic child seat recognition (ACSR) - AN91.60-P-0002-01C

Model 210 from 1.6.97 to 30.6.98

Connection schematic for ACSR

Fig 1: Identifying Connection Schematic For ACSR (1 Of 2)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Route wiring harness along existing wires starting from ETR control module with airbag (AB) (N2/2) in vehicle according to figure.
Connection schematic for ACSR

Fig 2: Identifying Connection Schematic For ACSR (2 Of 2)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Remove ETR control module with airbag (AB) (N2/2). Disconnect connector (3) from control module.

Fig 3: Identifying ETR Control Module With Airbag (AB) Connector From Control Module
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Open connector (3) (arrow) and pull out contact spring carrier (4).
If applicable, remove present wires from chambers 15, 33 and 37 (no longer required).
Insulate removed wires and tie back.

Fig 4: Identifying Connector And Pull Out Contact Spring Carrier
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Insert brown/white lead (br/wt) with contact spring from ACSR wiring harness (1) into chamber 15, black/brown lead (bk/br) with contact spring into chamber 33 and gray/yellow lead (gr/ye) with contact spring into chamber 37.

Fig 5: Identifying Contact Spring Carrier
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Close connector (3), connect to ETR control module with airbag (AB) (N2/2) and install.
Route black/brown lead (bk/br) from ACSR wiring harness (1) with white connector (wt) to lower control panel control module.

Fig 6: Identifying Black/Brown Lead From ACSR Wiring Harness With White Connector (Wt) To Lower Control Panel
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Connect white connector (wt) to lower control panel control module (N72).
Perform step 10 on vehicles already equipped with a connector.
Open white connector from ACSR wiring harness (1), remove lead from chamber 2 and insert into chamber 2 of present connector, close connector and connect lower control panel control module (N72).

Fig 7: Identifying White Connector To Lower Control Panel Control Module
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Connect brown lead from ACSR wiring harness (1) to one of the brown ground leads (br) on the ETR control module with airbag (AB) (W26) using a potential distributor (P).
Carefully insert brown lead into potential distributor (P), close cover and simultaneously press until it catches (arrow).

N2/2 ETR control module with airbag (AB)

3 Control module connector

Fig 8: Identifying Brown Lead From ACSR Wiring Harness To Brown Ground Leads On ETR Control Module
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 9: Identifying ETR Control Module With Air Bag And Control Module Connector
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Route tie-out to passenger seat contacting strip (X55/4) according to figure.

Fig 10: Identifying Tie-Out To Passenger Seat Contacting Strip
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Route black/yellow lead from ACSR wiring harness (1) in driver footwell along existing wires to fuse and relay box (F1) according to figure.

Fig 11: Identifying ACSR Wiring Harness In Driver Footwell Wires To Fuse And Relay Box
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Connect black/yellow lead from ACSR wiring harness (1) to fuse and relay box (F1), fuse 13, (terminal 15R).
Tie excessive lead length back in fuse box.

Fig 12: Identifying Black/Yellow Lead From ACSR Wiring Harness To Fuse And Relay Box
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Unclip old switch block for lower control panel control module (N72) from wooden cover (no longer required).
Use new wooden cover with recess for automatic child seat recognition warning lamp (N72e1).
Clip new switch block for lower control panel control module (N72) into wooden cover and connect to wiring harness.

Fig 13: Identifying Switch Block For Lower Control Panel Control Module From Wooden Cover
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.