I've never heard much serious going wrong with the Fes ST, odd gearbox spitting a gear through casing, coil packs can go, driver side seat catch likely broken, just to flimsy to incline a heavy seat, check both sides. Some bad tyre wear if tracking out. Had mine 8 years from new, had a seized rear caliper replaced and still on factory pads/discs and only this year a new battery.
Albeit I now have an engine warning light twice in as many months, worse case senario for me is the MR200 updates are taking a toll on the PCM which won't be cheap. Get a low miles one, few drivers, older owners better, check oil, look for leaks, look for clean and clear fluids, good gear change etc, no smoke all usual basic stuff, would be a good buy now too.
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MR200 Stage 3 200PS
Evans Halshaw
Mountune Pro