I have a sticker in my service booklet on the inside of the front cover that has a load of 3-character codes on it. I believe these are option codes and i've found a site that will decode these and list them in plain English. The site says it may not be 100% accurate though.
I hope this is useful to existing and potential RS4 owners. In fact, the site decodes option codes from any VAG group cars.
http://igorweb.org/equidec/Default.aspx
Apprently there is no letter 'O' in VAG option codes, it is a zero.
This may be useful if you want to check the original factory spec of the car. Putting my codes in, I get the following output:
I like the following one: 8Z5 = Not hot countryE0A = No special edition
7A2 = CD changer
4UF = Drivers and front passenger air bag with front passenger air bag deactivation
6XD = Exterior mirrors: electrically adjustable/heated
5SJ = Left exterior mirror: convex
6TS = Right exterior mirror: aspherical, large viewing field
1KY = Disc brakes, rear
J0Z = Battery 520 A (110 Ah)
1LP = Disc brakes, front
2MC = Sports suspension with variable shock absorption
3FA = Without roof insert (standard roof)
5MN = Decorative inserts
7X2 = Park distance control, front and rear
4R4 = Power windows with comfort operation andcircuit breaker
F0A = No special purpose vehicle, standard equipment
8GH = Alternator 190 A
0G1 = Gearshift lever
0YM = Weight range 12 installation control only, no requirement forecast
0JK = Weight category front axle weight range 10
TK7 = 8-cylinder gasoline engine 4.2 L unit 079.D (aluminum)
3NZ = Rear seat bench unsplit, backrest split folding
8EC = Bi-functional headlight with gas discharge lamp, for driving on the left
U1B = Instrument insert with mph speedometer, clock, tachometer and trip odometer
X2B = National sales program Great Britain
1N3 = Speed-related variable steering assist (Servotronic)
2PX = Leather trimmed sports steering wheel
8Q5 = Headlight-range adjustment, automatic/ dynamic with dynamic bending light (AFS 1)
9Q4 = Multi-function display/on-board computerwith check control
8Z5 = Not hot country
D0W = 8-cylinder gasoline engine 4.2 L/309 kW (32V) FSI, homogeneous base engine is TK7/TV7
7Q2 = Navigation system with color screen
C5K = Alloy wheels 9J x 19
7K7 = Tire pressure control, frequency 433 MHzbasic level version
4X3 = Side air bag front with curtain air bag
VJ3 = Reinforced bumpers
3L5 = Electric seat adjustment for both front seats
4KC = Side and rear windows in heat-insulatingglass
3Y0 = Without roll-up sun screen
4K2 = Radio remote controlled central locking "SZV"
5D1 = Carrier frequency 433.92 MHz-434.42 Mhz
1SA = Without additional engine guard
0GG = Emission standard EU4
Q1E = RECARO sports seats, front
4GT = Heat-insulating glass windshield
LOL. How true, today.