What is this connection for?

[iscom]

    There is a blue connection lying on top of the brake fluid reservoir anyone know whats its for ?

[ron]

There is a blue connection lying on top of the brake fluid reservoir anyone know whats its for ?

Is it not the fluid level indicator?

[thewww]

I thought it might be for a engine coolant sensor if they are fitted to any models.

[miccheck1516]

prettysure i have the same thing on my '05 1.9d, never bothered me, allways presumed it was for another model/spec.

[ffrenchie]

If it's connected as in the picture disconnect it and see what happens