I'm having a bit of a mare with my 52 S3. One of the Xenon bulbs doesn't always come on first go (the other one always does). Audi dealer suspected dodgy battery so fitted new one and made no difference. General feeling now is that it's the ballast on said dodgy headlight. Audi dealer quoting 408 +vat for whole new headlight!! Have contacted hids4u.co.uk and they think they might be able to supply a new ballast, but say it could be the bulb (or even the igniter, if it has one). Anyone else had similar problem? Does anyone know what type/make of ballast is in the S3? And (finally) can I remove the headlight without removing the bumper?!!!