What is this connection for?

 

Not sure where that is coming from. Is that the connection for the auto-leveling if you have factory BiX headlights? Just my guess. If so there should be a more or less matching one on the other side. I know there is a connecter there somewhere that isn't used if you don't have the auto-leveling, but I believe it is still included in the factory harness. (I think...)

 

Don't think it reaches the lights.

 

Wouldn't that be for the HVAC recirculation pump? The pump is missing from the clip on the expansion resevoir in the 2nd picture...

 

Oh could be? But I looked at a connection on one and it was a different plug.
If it is for the pump someone must have deleted it

 

It looks like the electric water pump is missing.

 

Is it needed and wouldn't it throw up a code if missing

 

could I annoy someone to check theirs and see if its the same connection?

 

That is the location of the aux pump, no? I'd say "yes" to it being needed.. it has to have a reason. Not all things will throw a code.

 

Looks the same to me, see pics here...
http://www.benzworld.org/forums/w203...iator-cap.html

It's only purpose AFAIK is to circulate hot coolant through the heater core when the engine is off. I don't see why it would throw any codes.

 

Yup. Here's where it supposed to go.


Whether the pump was ever there is the question.
It's an option code. In the US it's included, but perhaps not in UK.
It allows you to push the 'recirc' button on the dash when the car is turned off,
but the engine still warm, and blows heat at a low fan speed into the car for about 1/2 hour.

 

Very many thanks to everyone for taking the time to help me.

 

Send me the VIN I can tell you if was ever there.

 

WDB2037472A288562

 

Damn, there's no datacard.
Maybe it's because I have the US version.