VW Radio RCD300 vs 300+ Plus Differences - Setup Aux Input

I've got a new VW Passat (well new to me, it's a 2008 model) and I'm looking to add AUX capability to the radio. I have a JVC double DIN radio from my old Passat that I could move over but I'm investigating other options too.

VW RCD300 radio in 2007 Passat

The radio fitted to the 2008 Passat looks to be slightly different to the 2007 Passat I had before. The previous one was a RCD300 but this looks to be a RCD 300+/300 Plus radio. The key difference from what I can see is that it has the word MP3 on the front and on the model description to the rear.

Difference between RCD300 and RCD300 Plus/300+ radios

This designation also appears to mean that you can connect a simple plug to the rear connector of the 300+ to enable Aux input. The RCD300 requires more hardware to do this.

So if your VW radio has the MP3 designation then it is the Plus model and will be easier to enable Aux input.