You could plug your VIN into one of the decoders, and see if that option exists on your car. You could pull the fuse on the stereo and see if the car 'sounds' different. You could search your owner's manual, and maybe the I-drive menus where you MIGHT be able to turn it off, if it exists. I do not remember ever reading about it as an option on the GT, but I have not studied the M models.
What would the ASD be called? The below are the options for my VIN
Order options
No. Description
1CA SELECTION COP RELEVANT VEHICLES
2NG M L.A. WHEELS V-SPOKE 302M, 19"/AS
2VA ADAPTIVE DRIVE
2VB TYRE PRESSURE INDICATOR
248 STEERING WHEEL HEATING
3AG BACKUP CAMERA
319 INTEGRATED UNIVERSAL REMOTE CONTROL
322 COMFORT ACCESS SYSTEM
323 SOFT CLOSE AUTOMATIC SYSTEM FOR DOORS
4U1 CERAMIC EMBELLISHER FOR CONTROLS
423 FLOOR MATS, VELOUR
430 INT/EXT RR VW MIRROR W AUT ANTI-DAZZLE
431 INTERIOR RR VW MIRROR W AUT ANTI-D
453 ACTIVE SEAT VENTILATION, FRONT
455 ACTIVE SEAT F DRIVER AND FRONT PASSENGER
456 COMFORT SEATS, ELECTRIC. ADJUSTABLE
488 LUMBAR SUPPORT DRIVER/FRONT PASSENGER
494 SEAT HEATING F DRIVER/FRONT PASSENGER
496 SEAT HEATING FOR REAR SEATS
5AG LANE CHANGE WARNING
5DL SURROUND VIEW
502 HEADLIGHT WASHER SYSTEM
6AA BMW TELESERVICES
6AB CONTROL TELESERVICES
6NF EXT.CON.OF THE MUSIC PLAY.I.MOBILPH
6NL CONNECT. BLUETOOTH A.USB DEVICES IN
6NR APPS
6UH TRAFFIC INFORMATION
609 NAVIGATION SYSTEM PROFESSIONAL
610 HEAD UP DISPLAY
615 EXTENDED BMW ONLINE INFORMATION
655 SATELLITE RADIO
677 HIFI SYSTEM PROFESSIONAL
697 AREA-CODE 1
7MP PERFORMANCE PACKAGE
710 M LEATHER STEERING WHEEL
715 M AERODYNAMICS PACKAGE
760 INDIVIDUAL HIGH-GLOSS SATIN CHROME
775 INDIVIDUAL ROOF-LINING ANTHRACITE
8KC OELSERVICEINT. 24.000KM/24MONTHS
8SC COUNTRY SPEC. RELEASE OF TELESERVICE
8S4 DECODING VARIABLE LIGHT DISTRIBUTIO
8TN DAYTIME DRIVING LIGHTS SELECTABLE B
840 HIGH SPEED SYNCHRONISATION
9AA EXTERNAL SKIN PROTECTION
925 SHIPPING PROTECTION PACKAGE
Series options
No. Description
1CC AUTOMATIC START/STOP FUNCTION
1CD BRAKE ENERGY REGENERATION
212 NATIONAL BRAKE SYSTEM EQUIPMENT
302 ALARM SYSTEM
316 AUTOMATIC TAILGATE OPERATION
4BN FINE WOOD TRIM ASH GRAIN
4UR AMBIENT LIGHT
4U2 DRIVING EXPERIENCE CONTROL INCL. EC
402 PANORAMA GLASS ROOF
5DS LUGGAGE-COMPARTMENT EMERG. RELEASE
508 PARK DISTANCE CONTROL (PDC)
522 XENON LIGHT
524 ADAPTIVE HEADLIGHTS
534 AUTOMATIC AIR CONDITIONING
645 RADIO CONTROL US
8SM VIN, VISIBLE FROM OUTSIDE
823 HOT CLIMATE VERSION
845 ACOUSTIC BELT WARNING
850 ADD FUEL TANK FILLING FOR EXPORT
853 LANGUAGE VERSION ENGLISH
876 RADIO FREQUENCY 315 MHZ
