OBD2 connector missing

[Botus]

Yes, that’s pretty much it in a nutshell. It definitely doesn’t compute. All that is see in behind that panel is a connector with a bunch of brown wires going in which I have assumed is the CANBUS. Photo attached. I’m at work but will have another look later.

???

post 37 suggests only 2 of the diagnostic port wires might be brown... more greens and a white

 

[mioba]

I have took the liberty to google this. The ODB port is directly next to the bonnet release.
We need pics of what is there.

 

[Botus]

I have took the liberty timgood this. The ODB port is directly next to the bonnet release.
We need pics of what is there.

if its a w211 E280 CDI.... my father's has one made Feb 2006.... on his it's as I said above the gap between the brake and throttle pedal.... I've used it regularly

 

[mioba]

Thanks Botus,

This thread needs pics or we all lose interest .....

 

[Botus]

on my father's its on the other side (along with the steering wheel)… but closer to the wing than I thought but this location....

postion 2 not 1

 

[flex]

Will get photo up tomorrow.

 

[flex]

These are what I can see in behind lower panel.

 

[Blobcat]

These are what I can see in behind lower panel.

Is there a cut out or space in the lower panel for it? Can’t see a pic of the “outside” of the lower panel

 

[flex]

Hang on will tell the missus. It’s her took the pics.

 

[flex]

Hope these will do.

 

[Tony Dyson]

The aperture to the LHS of the red bonnet release catch is where it should be, there is evidence of previous modification work in the photo's and I would concentrate on what looks like an auto patch panel with the 6 or 7 brown pairs terminated into the black modular connectors, this item doesn't look OEM just hanging there, break it apart and look for EOL termination resistors within, a popular mod is to create a CAN-Bus test point for faultfinding purposes where a group of local controllers are brought together to a common point, trace the cores and see if they terminate to the same point as the fused feed you found.

 

[Botus]

in the youtube video it shows the flap very close to the red bonnet release and on post 70 - one of your blurry photos has the ODB plug hole next to the bonnet release just like the video

post 67 - the load of green and brown wires on your the picture with the words "zentrales gateway" on the white label are highly likely to be linked to the ones you need at the ODB socket... that box is the central gateway controller for all the eleccy control signals bouncing round the car

post 67 - the big bunch of brown cables side by side is likely just a major earth cable junction ?

so whats missing should be very close or what happened will be close by ?

 

[Botus]

there is evidence of previous modification work in the photo's

I didn't spot anything amiss ?

 

[Tony Dyson]

I didn't spot anything amiss ?

Unpopulated cutouts look to have been cut with a blunt instrument and not punched.
Some wiring looms contained with proprietary spirowrap type product (OEM) and some with old sparingly applied bituminised hessian tape, (Not OEM).
Splices covered in shrinkwrap sleeves immediately after a plug in connector (Not OEM).
Unpopulated sockets in the Central Gateway Controller
And of course the missing OBD socket
The patch panel I mentioned in post 71.
All point to earlier modifications of a less than proprietary quality.

 

[Botus]

nothing in post 67 looks unusual to me.... the load of brown wires mildly intriguing - might go rip fathers car to bits later if the weather is OK

 

[Botus]

attached pics from

WDB2110202A94xxxx E 280 CDI Feb 2006 build

the loom to the ODB plug appears to have a sister leg all light weight wiring (to the module behind the socket in this first picture, both sparsely wrapped in blue fabric tape) on my father's the module is white whereas your appears black, bit odd but probably just a diff supplier (of the central gateway ?)... and these legs of that loom BOTH disappear off up to the A pillar and shed loads of wires there - look harder - I expect it goes back to my first post it was just moved out of the way and is hidden up in the corner of the dash pretty close to the door mirror









fuse box for the hell of it - the first pic is taken through the hole at the bottom of this fuse panel on the end of the dash

 

[Botus]

Unpopulated cutouts look to have been cut with a blunt instrument and not punched.
Some wiring looms contained with proprietary spirowrap type product (OEM) and some with old sparingly applied bituminised hessian tape, (Not OEM).
Splices covered in shrinkwrap sleeves immediately after a plug in connector (Not OEM).
Unpopulated sockets in the Central Gateway Controller
And of course the missing OBD socket
The patch panel I mentioned in post 71.
All point to earlier modifications of a less than proprietary quality.

 

[Tony Dyson]

I assume your double negative is a typo and you are now in agreement There are many more examples in the other photo's, the upshot is that there most certainly WAS a functioning OBD port originally fitted to the car and some clever bugger/s, in their infinite wisdom has/have removed it and left behind an undocumented series of modifications?
I would as I stated earlier break the hanging (Patch Panel) connector apart and look for EOL termination resistors within, a popular mod is to create a CAN-Bus test point for fault finding purposes where a group of local controllers are brought together to a common point, along with the EOL resistors, trace the cores and see if they terminate to the same point as the fused feed you found.

 

[mioba]

what a bodge job by someone, I would not be comfortabale with a car where you cannot read the fault codes and by all intnets and purposes Mercs are pretty damn good when it comes to having to the codes read by a competent indy. How will you ever know the cause of a fault without an ODB port.

If I were you, I would be looking at the likes of 7zap and so on and figure our whats missing and see what parts you can get and get something made up or sell the car (which I would not be comfortable doing) in that state.

Doesnt help you per se but guidance.

 

[Botus]

looking at this part number you can get them back or grey early 2004 were black many grey show a date 2005 but you can find a grey 2004 too

below for good measure same part number as your picture - so no idea why you'd chop of the loom