A couple of things; there are two general classes of brake fluid – DOT and mineral oil. Don’t mix the two, either in bleed kits or brakes. If you have a bleed kit that uses mineral oil (Maguras, from memory, are mineral) then don’t use it to bleed brakes that take DOT fluid, or put DOT fluid in them – it’ll do horrible things.
I haven’t ever bled Maguras, so don’t have any knowledge of that system, but I have bled a *lot* of Hope, Formula / Avid (Formula designed the early Avid brakes, so there are similarities) and Shimano.
A couple of general tips:
* Take your time
* Be prepared to take it to a friendly local shop and pay them to do it properly should you make a mistake
* Find as many instructional videos or manuals as possible for our model of brake, and read up / watch them. Magura’s manuals can be found here: http://www.magura.com/en/service/downloads.html
* You don’t always need a fancy bleed kit – sometimes a spanner, a length of tubing and a yoghurt pot is all you need.
* Your local bike shop can be really helpful here – assuming you’ve gone to the trouble of making friends and buying from them regularly. You can probably get tips from the mechanic in exchange for beer / donuts / cake. You can’t get this sort of thing from an online bike shop, which is why it’s worth supporting good local bike shops, IMO.