The car is a 2011 A4 b8 Avant and i need help/ advice on removing/fitting part number 8K5853273Q this is the black triangular piece of plastic that fits between the main rear window and the rear quarterlight, i have spent 3 days searching for information on this but still no luck so far,  so any help would be most welcome.

Hello John,

Have you got the new piece ready to fit? If so, you can study where the fixings are.

Regards,

Gareth. 

yes i have the new part, its almost in but its the rubber trim parts thats preventing it from seating correctly, cant see how they come off, thanks

To me, it sounds like on of those predicaments where a visit to a local bodyshop armed with some cash will be the least frustrating route. 
Regards,

Gareth. 

Thanks I will have a look later, not much info around on this one

managed to fit it myself but it was a hard job trying to get the window trim back on.