After reading all the stories about the DPF additive being an expensive top-up, I was dreading the day when I had to do mine. Well it finally happened! The glowplug light would come on for a while then go out for a while. Turning the ignition off and on again didn't always get it to go out. The light was coming on more frequently and it was only a matter of time before the additive tank became empty. A call to my local Skoda dealer resulted in a quote of £280 to refill it. I looked for a c