Speedo reads KPH and needs to be UK MPH

Hello,
I am based in the UK and have a 500E that was originally a German market car and because of this the speedo is marked only in KPH.After looking at the speedo in my 280E I notice that it runs up to 260kph/160mph unlike the one in my 230.

If I can find the speedo head from a 280/300/320 that has ASR fitted, would i be able to just change the dial without having to worry about recalibration etc. I know the speedo will still rack up in kilometres but that doesn't bother me.

Any advice on how easy that will be and also if anyone has a speedo head from an ASR equipped 280/300/320 I may well wish to talk with you!!!

Thanks

Toby

it's 160MPH/260KM and you have no other choice.

the rest is 260KM which is mexico and canada version.