My experience is, that when Murena was standing long time in damp climate, also there was the problem with brake calipers - I mean the problem with corrosion between iron and aluminium parts of it.
Thanks all for the feedback.
The guy I bought the car from had already replaced he disks, calipers, brake lines, and clutch.
The car runs, drives straight and stops on a dime.
I do have some ignition problems as it runs a bit rough. For example, it does not matter if I pull the sparkplug wire from cylinder 3. No change in rough idle. 1, 2 and 4 it wants to stall if I pull them. I used this to find which was the problem. However, changing the plug and the wire had no effect. I cleaned the distributer, but it did not help much. I have now bought a new rotor and distributor cap and will try that this weekend.
I will definitely look at changing the coil and ignition module too.
The sparkplug wire on cylinder 3 had a collar, like the ones shown on the set at Simon Automobilteknik. I didn't think about it at first, but realize that the collar seals the pit, where the sparkplug is seated, from dirt and debris. I would therefore like to find a full set of those. Does anyone know if they are equivalent to another car make/model? Or do I have to get them from Simons?