VW / SEAT /SKODA cars enables you to: 
  *     recalibrate the odometer 
  * add keys to the car even though you don’t have all existing keys available
  * do key adaptation without 5 minutes delay on new keys
  * read out the login / secret key code (SKC)
  * write the vehicle identification number and the immobiliser number
  * download and store the entire immobiliser block decrypted
  * clone instrument clusters by writing the immobiliser block from a file
  * read out trouble codes of CAN-ECU´s and erase them
  * Those functions are absolute unique and give you the chance to earn the money
  * when you normally have to send away your customer.

An example:
a customer wants an additional key adapted to his car.
The normal diagnostic procedure requires that all adapted keys are available.
Unfortunately your customer brought only one key along.
At this point you have to send your customer away (and with him his money ...)
Not with VAGdashCAN.