Fieldyblue Posted November 1, 2015 Share Posted November 1, 2015 Hi There......new member here. I have an A6 TDi Ultra.......Sept 2015. Ad Blue warning light on after c4k miles........bought 4litres from Halfords, £20 I may add, and light is still on. How much do I need to add and is there anywhere that sells it cheaper apart from Amazon?? Thanks Fieldyblue Quote Link to comment Share on other sites More sharing options...
James Posted November 2, 2015 Share Posted November 2, 2015 Hi There......new member here. I have an A6 TDi Ultra.......Sept 2015. Ad Blue warning light on after c4k miles........bought 4litres from Halfords, £20 I may add, and light is still on. How much do I need to add and is there anywhere that sells it cheaper apart from Amazon?? Thanks Fieldyblue I read somewhere that it's a 17 litre tank but you should probably check your manual to be sure. Apparently you need to top up my a minimum amount (saw something about 5.7 litres) for it to register. That's really expensive at Halfords. Apparently some BP garages sell it via a pump for HGVs at around 60-70p per litre and you can fill up with that? Quote Link to comment Share on other sites More sharing options...
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