And Magura invented plastic screws on their MT5 levers
And Magura invented plastic screws on their MT5 levers, which tend to break if you overtighten them.
Magura recommend a very low torque of XX Nm.
The higher end model MT7 has metal screws instead of plastic ones.
You can find a pair of replacement screws in titanium on Aliexpress for around 6EUR shipped.
You can remove the broken bolt using a hot flat screwdriver of the right size (note mine here), wait a bit that it solidifies, and remove the bolt.