Posted: Wed Dec 2, 2020 12:30pm
Apparently some changes in the regulations in 2018 made mph only speedos no longer acceptable for an ITV but typically it should only have an impact on classic cars from UK and American imports most of which will also have mph only speedos.
Yours sounds like an unusual combination and I guess the salient question is, is the kph readout a standard feature of the car or some 3rd party GPS driven add on you've fitted yourself?
If it's a stock feature then I think it ought to pass as it will form part if the vehicles European homologation and in that instance my instinct would be to cross my fingers and try my luck.
I'm presuming here that it is a European model and not a grey import from somewhere else in the world?
There is a risk to that though because a fail on that point will be classified as 'grave' and if that happens it will mean that you will be restricted to driving the car home and then to the garage or workshop where you're having the problem corrected.
Changing a dial face, if in fact that's even possible on its own, may be a time consuming and costly task. More likely I would say, and possibly more practical, would be a complete change of speedo and if that's how it goes then will need a certificate from whomever does the swap stating the miles/km on the old and new odometers, it's an anti 'clocking' measure.
Good luck!