My company Audi A4 2.0 Tdi gave me an engine management warning light today (the go plug symbol flashing). I was nearly at my first job so continued for the last 10 miles. When I arrived the car wouldn't restart at first and whe it did the light continued to flash. However at lunchtime it started normally and no flashing light, so the Audi dealer said there was no point taking it in without the light flashing as they wouldn't be able to get a fault code. I drove back home (about 70 miles of mostly motorway) and had no further lights, but I'm going away in a few weeks time in it so it's making me a bit nervous (my last car a VW Passat did a similar trick, then failed completely on the way to the airport ). As I'm a little dissapointed with the economy being a couple of mpg less than my heavier and more powerful Passat I wonder if there is an underlying issue and whether it would be worth booking it in anyway (it's more the PITA of having to empty all my stock and tools out into a hire car that's putting me off TBH). Any thoughts?