hi, I have done 3k miles since getting my 1997 xk8 convertible, London-Croatia-Munich mostly motorway. I have had 3 instantances where the Failsafe Engine Mode light has come on. At first big panic, pull over turn off, open bonnett look for anything obvious nothing. Restart all clear carry on nervously no problem. 2 weeks later happens again this time unable to pull over straightaway, carring on with no obvious problem eventually stop check everything again all seems ok start off cleared drives well. Got home checked all fluid levels ok. Bought one of those BT odb2 dongles and torque pro to see if there were any fault codes, none. Heading back to London via Munich and it happens again, have the torqure running monitoring coolant temp and that still showed no fault code. Had to keep going another 150 miles to Munich car drove like a dream......Any ideas will I have to take it to a dealer when back in London. cheers