In trying to determine whether or not the center console of my '02 Sport interior was lined with genuine or synthetic leather, I contactd BMWUSA and received the following details on the two types of trim (Sport and Luxury). The rep indicated that this is specifically for '02 and that he/she had not pulled information for any other model year.
> Sport
> This interior theme highlights the M5's stunningly sporty and high-tech
> nature, and features Nappa Point leather stamped appearance similar to ostrich
> leather) with Extended coverage (i.e., more extensive than that in the 540i
> sedan). Seats are cross-pleated at relatively wide intervals; the standard
> trim material is aluminum-look. Upholstery materials are summarized in the
> table below:
>
> Seat center areas // Nappa Point leather
> Seat side areas // Nappa leather
> Back sides of seats, Head-restraint centers and sides, Door-panel inserts //
> Nappa Point leather
> Door panels // Foam-backed grained material
> Door armrests/pulls // Nappa leather
> Door ledges, Main and upper dash areas, Glove-compartment door // Shaped skin
> (leather grain)
> Center console and armrest // Nappa leather
> Rear parcel shelf // Velour cloth
> Headliner, incl. sun visors & A-, B upper and C-pillar // Alcantara
> B-pillar lower // Grained plastic
>
> Luxury
> This interior theme puts the accent on luxury. The Nappa Heritage leather used
> here is ultra-soft, and is applied even more extensively than in the
> corresponding Sport version. Seat pleating is longitudinal, with closely
> spaced pleats. The Luxury interior is available in Black and Caramel, the
> latter being especially warm. Here, Bruyere Club wood trim is standard, with
> Burl Walnut as a no-cost alternative.
>
> Seat center areas // Nappa Heritage leather
> Seat side areas, Back sides of seats, Head-restraint centers and sides //
> Nappa Heritage leather
> Door-panel inserts // Nappa Heritage leather
> Door panels // Nappa Heritage leather
> Door armrests/pulls // Nappa Heritage leather
> Door ledges // Nappa Heritage leather
> Upper dash areas // Nappa leather
> Main dash areas // Nappa Heritage leather
> Glove-compartment door // Nappa Heritage leather
> Center console and armrest // Nappa Heritage leather
> Rear parcel shelf // Alcantara
> Headliner, incl. sun visors & A-, B upper and C-pillar // Alcantara
> B-pillar lower // Nappa leather