According to the chart I have, your Leon is still using the K-Lines for diagnostics and is compatible with VCDS-Lite. 2006 and newer are CAN diagnostic based according to my chart. If you would care to check for yourself, you can look at our World Spec Compatibility Chart. Use the 7 & 8 digits of your VIN to check compatiblity. If you find your car is compatible with our KEY/KII interface than the VCDS-Lite with your third party wire should also be compatible.
