hi i have an audi b6 avant pd130 quattro. and have abs and esp lights on and no speedo. i have done a diagnostic and says speed sensor front left. which i replaced and still have the issue so i changed abs ring and still have the same code. so do i send it away and have it refurbished at 250quid plus vat. or but another abs ecu and have it coded. but i dont have the ability to do that myself so what are my options?? can i buy a version of vcds for under 90quid and do it myself or is sending away the best option. please help as love the car but this is very annoying