As the title suggests really, my 2009 S3 stage 2+ sport back has a judder under acceleration. It's prominent in 1st, 2nd and a little in third but then disappears. At its worst when turbo kicks in. Feels to me like it maybe something like a driveshaft or the prop really but not ruling out the haldex or maybe even a misfire?! Any common problems, I've had a search on here but to no avail sadly. I'm not sure if it's had the haldex service, its on 44k. That's if it can be serviced, I read about different gen haldex units on different years!
Thanks in advance.