New owner of 2009 convertible... Lots of questions

[TBarCYa]

I'm not sure where to start...

So the car is a 2009 but the interior appears to be from the 2008. Is this normal for the convertibles to be a year behind in interior updates? It's also got the S-Line badges on the exterior but the door sills don't have the logo. Is this typical of the convertibles? It has 18" wheels which should be from the S-line but I'm not sure if someone added s-line badges to the exterior or replaced the door sills with the wrong ones.

Do the B8 convertibles with Nav and Bose come with a subwoofer? If so, where would it be located? If any convertibles come with a sub, can someone post a pic because I'd rather add a sub to the OEM location than deal with a box and losing trunk space.

On the top frame, right about where the b-pillar would be there's a plastic piece on each side that is broken on mine. I can't figure out what they do because the top works fine and they never separate during the opening / closing process so I'm undecided if I should glue them (so the longer end doesn't hang down after closing the roof) or try to find replacements. I'd have no idea how to get replacements because I can't find a part number anywhere online.

Thanks in advance for any help.

[eMacPaul]

Yes, Audi refreshes the cabriolets after the sedans and avants, so you actually have a B7 A4. I also have an S-Line, with no interior S-Line markings.

I'm not sure on the subwoofer.

Can you post a picture of the broken pieces?