S2 Clean air zones - Vehicle details are incomplete

[YELL MAN]

Don't know but mine has Coupe as the body type not special purpose like yours says and for model it has Coupe S2 4x4 Turbo.

Other than that mine is identical.

[B5NUT]

As Newcastle are introducing a clean air zone, I figured I would check to see if my cars are exempt. So far all of them are, which is surprising I do wonder if this is just another diesel tax, to get rid of all the old diesel cars?

However when I put my S2 in the government vehicle checker Drive in a clean air zone - GOV.UK (www.gov.uk) I get the following message.
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Now I've compared the details from my V5 on my A4 to my S2 as there is only a year apart between the two cars, and the fields are very much identical. Any idea what I'm missing?
FTF.jpg