There used to be an MOT place near where I worked - they used to make a fortune out of "corroded hydraulic brake lines".
Whenever anyone failed an MOT it was always for brake lines.
I used to take my cars somewhere else and my brake lines never got pulled.
They appear to be the same for the Coupe & Cabriolet
I have an EPC account. The EPC for my Cab shows both Coupe and Cab with the same trim parts.
The part Nos. are
A 124 690 5725 xxxx for the left side
A 124 690 5825 xxxx for the right side
where xxxx is the colour code
I had the side panels off last week and from what I remember the grilles are held in by plastic pins/rivets which are locked in the rear by tiny retainer washers which are pressed onto the plastic pins.
The speaker grille No. is A 124 690 0108 Plus colour code.
The part No. A 000 820 1853 is for the cigar lighter itself. the bit that comes out. I just checked the EPC and the housing No. is A 170 680 0652 - Housing with blinds and shelf.
So it looks like the dealer isn't kidding.