Electrical function schematic for on-board diagnosis - PE07.10-P-2720-97XAI

Code:	Designation:	Position:
1	Engine control diagnosis, communication	9C
1	Engine control diagnosis, communication	7C
1	Engine control diagnosis, communication	6E
1	Engine control diagnosis, communication	6G
2	Engine diagnosis indicator lamp, actuation	7E
2	Engine diagnosis indicator lamp, actuation	3B
A1	Instrument cluster	2C
A1e58	Engine diagnosis indicator lamp	1A
CAN D	Diagnostic CAN	8C
CAN E1	Chassis CAN 1	6F
CAN E2	Chassis CAN 2	4B
N10/1	Front SAM control unit with fuse and relay module	6C
N3/10	ME-SFI [ME] control unit	6H
U1032	Valid for engine 278 and 157	5H
U391	Valid for gasoline engine 276.8	5H
U392	Valid for gasoline engine 276 except gasoline engine 276.8	5H
X11/4	Diagnostic connector	11C

Fig 1: On-Board Diagnosis - Electrical Function Schematic

Courtesy of MERCEDES-BENZ USA