You have to be careful when removing the frame that holds them given the locating lugs are easy to snap of upon removal, it can be tricky if you're not very technical, but certainly not impossible mate, you have to edge each corner out a little at a time, battery doesnt need to be disconnected IMHO & done fair few jobs with steering wheel/airbag of with battery connected still, but vagcom is always advised.used in these situations to verify all is ok upon completion of work.