Has anyone done this on their S3 & if so, is it hard to do? I think you have to remove the coilpacks to get at them (is it worth replacing these at the same time and does anyone know how much coilpacks are likely to cost?)
Can anyone recommend a decent plug make to replace the OEM (Bosch i think) ones with - NGK / Champion etc?
Thanks in advance
(apologies for the stupidity of this but i've only ever owned diesels)