I had this problem although mine is a mk5 cabbie... but shouldnt be much different. Take your dials out, and where the cable that fits on the back of your dials goes into the engine bay, slot it thru there and take it where ever you want to after that, ensure that the seal goes back on cutting a slight gap for the pipe to the gauge to get thru. Thats how i did mine and then put it all back together. My gauge is in the coins tray, like where the clock is on the cossies.