Thank you everyone for your past help. I've been researching 635's, but can't figure out what I have. It's a 1987 635csi with full black leather interior / black carpet. Everything inside is leather dash/door panels/back seats and side panels/cooler etc. Is it just a csi or is it a L6? I can't find anything to tell me. If it's not an L6, what makes it different? Thanks again.

All L6 had that as an emblem on the trunk.

There was a highline model that also had more leather than the csi.

The L6 was a luxury version only available in the US and in automatic form. In the UK it was called the 635CSi Highline and some manual cars were made. This car had a leather head lining, leather door skins, leather dashboard, etc.

Weight is also an issue.

Model weight in kg HP per 1000kg ratio of differential

635CSi Coupe M30 77-89 1430 152 3.07 / 3.45 (US)
M6 Coupe S38 83-89 1500 191 3.73
L6 Coupe M30 ?- 89 1560 117 3.25

US power figures for this car were quite a bit lower than euro figures and the cars were around 85kg heavier as well

http://www.unixnerd.demon.co.uk/e24.html

Later,

Thank you for all the help. This has been the best site for information and everyone is really friendly and helpful. I guess I have an L6 model. Now I need to find the value so I can put it up for sale. The car looks new and has 75,000 miles, but I need to part with it for a new Ferrari. Thanks again!

tellab is the dash leather or vinyl?
Is your car auto or 5spd?

Alllllllllllllllllllll leather! Automatic but I can't find anywhere that it says it's an "L6"

Is the upper part of the door panel (where the tweeter is) two tone leather or vinyl?

if it's a factory L6 - it should say "L6" on the rear trunk - it it says "635 CSi" then it's a CSi.

also - all the "L6"'s were autos..