Specification:
•Touch screen user interface
•Integrated Bluetooth handsfree system
•Integrated DAB Digital Radio tuner
•Integrated A2DP Bluetooth music/audio streaming (with compatible phone)
•SD card reader built in for MP3 and WMA music files; reads full track details
•5" TFT Colour touch-screen
•Latest Maps pre-installed on internal flash memory
•MDI (Media Device - iPod) compatible
•RVC (Reverse camera) compatible
•OPS (Optical Parking System) compatible
•Graphical display of climate control - if available in car
•Dynaudio and VW Sound System compatible
•Position sensing via ABS sensors
•Acoustic driving instructions
•Optical pictograms in the on-board computer display monitor (Highline DIS only)
•Adjustable radio loudspeaker volume control for the output of driving recommendations
•Selectable menu language: German, English, Dutch, Italian, French, Spanish
•Selectable road map orientation
•Guidance to destination "turn by turn"; full UK postcode entry
•Dynamic navigation which re-routes when there are traffic problems ahead
•Evaluation of TP and TA
•TIM: Traffic news memory
•TMC - Traffic Message Channel
•POI - Points Of Interest such as petrol stations, airports, train stations, car parks, theaters, shopping centres, cash machines etc etc...)
•Ability to play music from internal CD/DVD and use GPS at the same time
•Split screen display - compass/3d map view, gps stats/map, bird's eye map view/3d map view, etc.
•RDS/EON VHF (stereo), MW* TP, TA
•Speech distortion elimination during traffic news
•24 memory presets (TP, FM, AM, on the memory levels 1 and 2)
•Radio and memory scan
•20W x 4 output power (RMS)

Got mine second-hand from PASHKA - on this forum - I recommend this seller; very helpful.
I also needed an update on CanBus gateway to fit this to a 2007 Edition 30 (prevents battery drain issues- at an additional £30).
Fitting is simple, other than pulling cable for the DAB aerial.

much cheaper for a DAB unit, than a VW 500 series.

Notable improvement in sound quality over my original RCD 300 6CD/FM/AM unit.

Disadvantage - seems to be that I cannot (yet?) integrate with my OEM MFS - so have lost mute & volume control functions...a little disappointing. Seems the 500 series is ok with this?