I thought I'd start a new thread about TDI Tuning boxes. Usually, I buy 4 year old cars, so if i was looking for a little extra power, I'd opt for an ECU remap. However, i bought my current A3 2.0 TDI from new, and don't want to void the manufacturers warranty. Tomorrow, I'm heading to TDI Tuning in Essex to grab one and fit it. Currently, I average about 48-52 MPG using VPower diesel and do varied motorway miles and town driving with a heavy foot The main reason for me getting a tuning box is for power though but ill be interested to see what effect it has on fuel economy. They've quoted me 189bhp and 416Nm torque from its standard 139 BHP and 320 Nm, all in a removable box that will revert the car back to factory standard after unplugging it. After I've had it fitted, ill post some updates, continuing to run it on VPower diesel. It comes with a 14 day money back guarantee so I've got nothing to loose by giving it a go.