Just a bit of info on these I've had the MXS - 5.0 for about 5 year and would advise anyone thinking about using one for car batteries to buy a NOCO genius5 its about the same price but better built, thicker cables and it runs cooler. I burned mine out on a 110Ah car battery, it was fine for my bikes but I did notice how hot it got when charging car batteries. No problem with the NOCO for either.
I don't want to put people off buying the Ctek but they are limited in what they can do, despite the instructions. It's only my personal experience others may have better views.