Here’s an interesting website regarding your vehicle’s options, which tells you how your Audi was equipped from the factory, Ingolstadt in my case. You could find a sticker with option codes on the first page of your service records manual or inside the trunk on the right side of the spare wheel well. Besides Audi, decoder covers the following makes as well: VW, Seat, and Škoda.
http://igorweb.org/equidec/default.aspx
MY2005 Audi S4 6AT Brilliant Black Sedan:
E0A = No special edition
7A0 = Without CD changer/CD player
4UB = Air bag for NAR
6XL = Exterior mirrors: with memory function, automatically dimming, electrically foldable/adjustable/heated
5SG = Left exterior mirror: flat
5RW = Right exterior mirror: convex (US) large viewing field
1KE = Disc brakes, rear
J1U = Battery 450 A (95 Ah)
1LJ = Disc brakes, front
1BD = Suspension/shock absorption for special sports design
3FE = Electric slide/tilt sunroof with sun screen/sunblind
7TF = Decorative aluminum inserts
7X0 = Without park distance control
4R4 = Power windows with comfort operation andcircuit breaker
F0A = No special purpose vehicle, standard equipment
8GH = Alternator 190 A
0G7 = Tiptronic
0YM = Weight range 12 installation control only, no requirement forecast
0JM = Weight category front axle weight range 12
T79 = 8-cylinder gasoline engine 4.2 L unit 079.C (aluminum)
3NZ = Rear seat bench unsplit, backrest split folding
8EH = Bi-functional headlight with gas discharge lamp, for driving on the right(US design)
U1B = Instrument insert with mph speedometer, clock, tachometer and trip odometer
X9A = National sales program USA
1N3 = Speed-related variable steering assist (Servotronic)
2ZP = Leather trimmed sports steering wheel for air bag system with tiptronic and “S” badge
8Q3 = Automatic headlight-range adjustment dynamic (self-adjusting while driving)
9Q4 = Multi-function display/on-board computerwith check control
8Z6 = Hot country
D5E = 8-cyl. gasoline engine 4.2 L/253 kW 40V multi-point injection base engine is T79
7Q9 = Navigation system
CS1 = Alloy wheels 8J x 18
7K0 = Without tire pressure warning light
4X3 = Side air bag front with curtain air bag
2K4 = Standard bumpers
6R0 = Selector lever cover
3L4 = Electric seat adjustment for both front seats, drivers seat with memory system
4KC = Side and rear windows in heat-insulatingglass
3Y0 = Without roll-up sun screen
4K8 = Radio remote controlled central locking operated from inside, front and rear and separate trunk release “SZV”
5D2 = Carrier frequency 315 MHz
1SA = Without additional front underbody guard
0GM = Emission standard LEV 1
Q1E = RECARO sports seats, front
4GP = Windshield in heat-insulating glass withsunshield and viewing window for vehicleidentification number
MY2005 Audi S4 6MT Atlas Gray Sedan:
E0A = No special edition
7A0 = Without CD changer/CD player
4UB = Air bag for NAR
6XL = Exterior mirrors: with memory function, automatically dimming, electrically foldable/adjustable/heated
5SG = Left exterior mirror: flat
5RW = Right exterior mirror: convex (US) large viewing field
1KE = Disc brakes, rear
J1U = Battery 450 A (95 Ah)
1LJ = Disc brakes, front
1BD = Suspension/shock absorption for special sports design
3FE = Electric slide/tilt sunroof with sun screen/sunblind
5MK = Decorative inserts, carbon weave
7X0 = Without park distance control
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
0JL = Weight category front axle weight range 11
T79 = 8-cylinder gasoline engine 4.2 L unit 079.C (aluminum)
3NZ = Rear seat bench unsplit, backrest split folding
8EH = Bi-functional headlight with gas discharge lamp, for driving on the right(US design)
U1B = Instrument insert with mph speedometer, clock, tachometer and trip odometer
X9A = National sales program USA
1N3 = Speed-related variable steering assist (Servotronic)
2PL = Leather trimmed sports steering wheel for air bag system with “S” badge
8Q3 = Automatic headlight-range adjustment dynamic (self-adjusting while driving)
9Q4 = Multi-function display/on-board computerwith check control
8Z6 = Hot country
D5E = 8-cyl. gasoline engine 4.2 L/253 kW 40V multi-point injection base engine is T79
7Q0 = Without navigation device
CS1 = Alloy wheels 8J x 18
7K0 = Without tire pressure warning light
4X3 = Side air bag front with curtain air bag
2K4 = Standard bumpers
6R2 = Leather gearshift boot
3L4 = Electric seat adjustment for both front seats, drivers seat with memory system
4KC = Side and rear windows in heat-insulatingglass
3Y5 = Electrically operated roll-up sun screenfor rear window and mechanically operated for side windows
4K8 = Radio remote controlled central locking operated from inside, front and rear and separate trunk release “SZV”
5D2 = Carrier frequency 315 MHz
1SA = Without additional front underbody guard
0GM = Emission standard LEV 1
Q1E = RECARO sports seats, front
4GP = Windshield in heat-insulating glass withsunshield and viewing window for vehicleidentification number