last night while driving home i accellerated a bit too quickly the esp light came on there was a popping sound then the car started to shake and judder even in neutral when i opened the bonnet the catalytic converter was glowing red hot i think it has started misfiring is this common

car is a 52 plate A4 1.8T automatic 163 ps not a quattro

also phoned local audi main dealer who want to charge £65.00 per hour is thiat a reasonable hourly rate