Did you get to the bottom of this issue?
The reason I ask is I have a Yeti 4x4 (140) tdi elegance and when checking brake pads and discs have discovered that the originally fitted front pads do not have any wear indicator wires at all. There is no connection for this either, just the ABS sensor on the hub, which is probably a similar connector to the pad wear one.
Looking at all Pagid and other pads for sale for the 288x25 disc and caliper15" FN3 it appears they all come with wear indicator wires, but it doesnt look like any are fitted to this Yeti and maybe other Yeti's?. Seems odd to me as thought this was standard fare these days, especially on a top of the range model.
The reason I started checking the brakes was I noticed it was vibrating when slowing and turns out it is the usual rusty discs on rear and front.
One of the rear pads was well worn down, more than others, so looks like the handbrake had been partially on and it was a bit stiff, so lubed the plastic cover with silicone on mech cover which has improved operability (known issue).
Rusty discs... Pretty poor for a 2.5 year old car (25k miles), but seems its not good to be green and you need to do heavy braking regularly to keep discs/pads in working order.
Will have to replace rear discs and pads, even though the sliders are all free and nothing really amiss. Fronts will clean up with some more heavy braking.
