I've got a Mk5 Golf 1.4 TSi sport and I'm contemplating getting sat nav after getting rather lost yesterday!

I can buy the Factory fit unit (the latest dvd one that will also play audio CD's) with an antennae for £500 or the other option is the new Tom Tom 720 (I think that is the model!!) for about £300...

I'm not sure how easy it is to retro fit a factory unit, has anyone done it?


Thanks