I must be a total numpty but I can't find the master cylinder on my 2008 2.0TDI C6 Avant!! Should be accessed through the 'apron' at the rear of the engine bay but whereas the manual shows the plastic grille cut away revealing the yellow filler cap there is no cutaway and no access through the 'apron'
A6 Engine Bay.jpg

Any one else's gone missing?!

Thanks