Plan to replace RCD 310 by RNS 510 in 2011 Tiguan

[Ryan_R]

Where does it say 18.5GB? If it's the screen that shows up when you're copying music to the drive, then this is only the size of your music partition, not the whole drive. On Firmware 2xxx there are 2 partitions (music + maps), and on Firmware 3xxx there are 3 partitions (one for POIs).

If you install the latest firmware it will wipe the drive, but you'll also need a map disc. See the stickied threads in this subforum for more info.