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Old 07-23-2017, 04:04 PM
ChrisArnt's Avatar
Registered User
Join Date: Dec 2009
Posts: 279
1996 E300 Diesel W210 Relay locations?

I'm looking for all the relays on my 1996 E300 Diesel W210.
So far I cannot locate many.
You play nice and so will I.
Chris NJ
96 E300D, 71 Baja Beetle, 77 Convertible Beetle, 2003 Subaru Forester.
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Old 07-23-2017, 07:00 PM
jay_bob's Avatar
Control Freak
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,428
W210 control overview:

Main fuse box is in the rear by the battery under the rear seat. This just contains fuses that are all on the unswitched dc bus (circuit 30) straight from the battery.

Next to the fuse box is the PSE pump. Unlike the pumps in the 124 and 126, the 210 pump also contains controls and relays for most of the devices in the rear of the car.

Under the hood are two control boxes.

The drivers side one contains a major fuse box that carries most of the rest of the electrical loads in the car except for the engine related loads, and the lights. Also in this box are the Front SAM module and a relay assembly. Finally you have the 38 pin diagnostic connector here as well.

The passenger side box contains the engine control module, transmission control module, and ABS control module. There is a relay/fuse module here, this is the dreaded "K40" that contains all the fuses for the engine/drive train control circuits and the starter control relay. This device is an outgrowth of the "OVP" module known from the 123/124/126 models.

I have had the W210 dashboard apart all the way to the firewall. There are no relays or fuses behind the dash, except for the dozen fuses in the side of the light switch that are accessed from the sail panel. Every exterior light in the car goes through one of these fuses.

There is a CAN Bus junction connector under the carpet adjacent to the front passenger door sill. This is where all the CAN Bus lines from the various body modules converge.

Good reading here:
W210 Home Page
The OM 642/722.9 powered family
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)
2008 ML320 CDI (Older sonís DD)
2008 E320 Bluetec (Younger son's DD)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech
gone but living on
1983 240D (body to greazzer, engine to t walgamuth)
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