The Results are in....
(LEFT) = Cree 25w
(RIGHT) = STD W16W
(BOTH) = Cree 25W Bulbs
(LANE TEST) = BEFORE .......TAKEN FROM INSIDE CAR
(LANE TEST) = AFTER .......TAKEN FROM SIDE OF CAR
Although i think the W18W Cree bulbs look great, Ive had trouble installing them though, but they are in now, i think they are a bit temperamental because they didn't seem to click in as the W16W bulbs did for a nice solid connection, and when i turn the car on, the left Cree bulb seems to flash a few times, also, i did get a few errors on the dash during testing, i tried turning the bulb around but the error remained, in a fed up mood i turned the car off and went home for an hour before having another shot at it, when i returned, miraculously, the errors had gone?, which has got me stumped a bit, the only thing i can think of that was causing the errors is the connection, so i might take it apart tomorrow and use duck tape to secure the bulbs in place so there's no movement at all, hopefully that will do it, it is such a frustrating job to get at the bulbs, i wish there was an easier way but there's not, so if i leave them as they are and i drive over a bump, i feel like they are likely to come loose, im a bit disappointed that they don't fit like the W16W bulbs do, but they are great bulbs none the less, there just a bit of a pain if fitting in an 2005 - 8PA - 103KW Version of the Audi A3 2.0 TDi Sportback, if i continue to have issues i may look at upgrading the lights housing, i wanted to do that anyway just not this soon, lol, although if i do that i bet these bulbs wont fit then, ill have to get new ones again? - if there's any pointers or info that anyone thinks may help then please feel free.