Re: V6 TDi whining noise - sounds like a supercharger –
26-05-2017,02:11 PM
Of course it might not be the fan - it might be trying to complete a DPF regen... you get a sound of a fan running and lots of hot air coming out from under the front of the car.
You can kinda tell if it's trying to do a regen because it seems to also adjust its gear shift selection - holds lower gears to keep engine temp up. If you have the exhaust in dynamic mode it's noticeable that the car seems noisier (akin to sport mode). It's subtle but once you understand the feel of the car you will start to notice and will be able to tell when a DPF regen is under way - I now routinely take the car for a 15 minute drive in sport mode to get the regen to complete.
A6 allroad BiTdi (MY14, July 2013 - DAB & power tailgate). Glacier white, tech pack (HDD Nav, colour DIS, Parking Plus), sports seats, 4 zone climate, heated seats front and rear, ambient lighting, 75L fuel tank, adaptive Bi Xenon headlights