The result was due to a faulty additive valve a new fuel tank is needed. Was told that tank would be approx 700 then the eolys would need filling about 100 and then labour, no mention of the adblue tank. total will be £2000. I am booked in to have the work done, my reason for the post is I would like to understand where this faulty additive valve is, is it actually in the tank that needs replacing ?
Thanks
ps. am a decorator not a mechanic, last time I looked under a bonnet it had a carburrettor in it