The A8L that you want to watch for are the A8L W12's.
They have the 450hp W12 engine, and most of them are fully decked out. (Were about 112,000.00 USD new MSRP, and have the alcantera headliner and trim, leather upgrades like the dash, center console, full door panel trim etc. Also many of the W12 A8L's have the solar sun roof option, something I miss from my 98.)
You lose the ability to see out of the sunroof, but on hot days, it is so very awesome to get into your car, and it's no hotter inside than it is outside. (And if you were only gone for a moment, it's actually cooler, as the air is blown over the evaporator, and if it's cool, it keeps the incoming air cooler than ambiant.) My 98 allowed the panel to be tilted open too, allowing hot air out easy, and still remained in contact so the fan was pushing fresh air into the car as long as the sun shines.
The leather wears better than the stock interior too, as does the Alcantera v/s stock cloth headliner. (I think it's quieter too, but my old A8 also had the dual pane glass, as do many of the fully decked out W12's.. Another benefit.. It's quieter, cooler/warmer and as it's laminated, very resistant to theft. (Like a windshield, it has a layer of plastic between two layers of glass, so you get thermal benefits along with the sound deadening effect.)
The downside to my old A8 was the solar panel also included a specially coated windshield and side glass. My cell phone, or radar detector barely worked. (Was a waste of time actually, and often to get a cell signal, I'd have to open the sun roof, or roll down the windows... Pretty funny, but it's a shielded envrionment both from the sun, and radio signals.)
Lastly, the A8L's with the rear center console generally have a built in cooler where the ski pass/sack goes. (You can keep some beverages cool there, and the console has pockets and upgraded controls for 4 zone heating/cooling and of course the power rear seats with power cooling/heat.)
Down side is feeding the W12 beast fuel.