Mk4 Cdti 1.7 - the emissons light keeps coming on and going off again. If I rev the engine I get clouds of black smoke and next time I drive it the light has gone out.
Admittedly I drive like a granny (have you seen the price if the black gold??!!) Am I sooting up the exhaust going slow - with a bit of revs from time to time clearing it out?
I had a look through the forum and found a post that had the same issue but the link did not lead anywhere.
Is this anything to worry about or could lead to big ££££'s?
Cheers for any advice.