Why We Use Liqui Moly DCTF This service kit includes premium quality transmission fluid and an OEM quality gearbox oil filter designed for use in the 0BT variation of the DQ500 gearbox. Our DSG Gearbox Service Kit for the 7 Speed, DQ500 (0BT) is suitable for most Volkswagen Transporters (T5, T6 or T6.1) and several VW Tiguan models.