Be careful. Pins that are too large can loosen the corresponding pin-sockets in the connector in the car and cause dogdy connections in the future when you use VAG-COM or the
dealers' tool.
It amazes me that some of the people who make these items appear never to have bothered to read the specs for these connectors. The specs are an international norm (SAE J1962 or ISO 15031-3) and contain all the dimensions and tolerances one could possibly want when designing a connector like this.
-Uwe-