Which CTEK

Any recommendation which CTEK unit would be suitable for my 2010 1.8ltr MX5

I don’t think it matters. Have you considered the Aldi or Lidl offerings?

I have the CTEK MXS 5.0 for my 1.8 NBFL and been really pleased with it. Got it about 9 months ago and it works well. I also bought the longer 2.5 metre extension battery lead so I can mount the charger on my garage wall. My battery is in the boot but it closes fine without trapping the lead. I realise your battery location maybe different but it should still work.

Thanks for the info chaps