I did drive it a few of times as it was only idling rough but seemed to be running ok on load, it was booked into the merc specialist but lock down put a stop to that. there was no engine warning lights lit up but im not using it now until I get it sorted as the orange engine light came on at the weekend intermittently .
NGK coil packs are only £50 or so each so still not to deadly a repair bill....I can do the plugs and coil packs myself as access is good so no specialist labour costs just the 600 or so for the coils and plugs ....