C 320 CL (203.764) V6-3.2L (112.946) (2004)
Voltage supply
The ME-SFI control unit is supplied with voltage at circuits 87 and 30 as follows (fused/unfused):
Model 129, 140
by the base module
Model 170, Model 210 up to 2/97
by the relay module
Model 202, 208,
Model 210 as of 3/97
by the fuse and relay module
MODEL 163
by the fuse and relay moduleF1
Model 215, 220
by the right fuse and relay module (K40/7)
Model 203, 209, 211
from SAM control unit with fuse and relay module (N10/1)
Model 230
Right fuse and relay module (K40/4)
Ground connections of output stages
Several ground connections of the ignition output stages and the ground of the electronics are attached close to the ME control unit (major assemblies
compartment partition, wheelhouse or body).
The ME control unit features a short-circuit protection as well as a reversed polarity protection in the operating voltage range.
In certain cases voltage is supplied through several pins connected in parallel by means of bridges to relief the electrical connectors.