Central gateway control unit (ZGW), remove and install - AR54.21-P-0817SX

MODEL 216.3, 221.0 /1

Shown on model 221 up to 1.6.08 without code (809) Model year 2009

Fig 1: Identifying Central Gateway Control Unit, Electrical Connector, Catch Hook And Bracket

G07542502

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Stage basic data from the central gateway control unit (N93) in STAR DIAGNOSIS	When installing new central gateway control unit (N93). Install: Transfer the buffered basic data to the new central gateway control unit (N93).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
2.1	Remove cover below dashboard on left	Model 216.3, 221.0/1 up to 1.6.08 without code (809) Model year 2009	AR68.10-P-1500SX
2.2	Loosen cover under instrument panel () and place to one side with electrical lines connected	Model 216.3, 221.0/1 as of 2.6.08 Model 216.3, 221.0/1 with code (809) Model year 2009 Only disconnect the electrical connector of the left front footwell lamp.	AR68.10-P-1500SX
3	Switch off ignition and withdraw transmitter key or Keyless Go start/stop button from the EIS [EZS] control unit	Keyless Go start/stop button only for vehicles with code (889) Keyless Go.
4	Unclip central gateway control unit (N93) from bracket (1) and remove downwards	On model 216.3, 221.0/1 as of 2.6.08 or model 216.3, 221.0/1 with code (809) Model year 2009 the central gateway control unit (N93) is assembled on the left in the instrument panel next to the left instrument panel fuse box.
5	Separate electrical connector (3) and remove central gateway control unit (N93)
6	Install in the reverse order