thanks,Benzmac,checked red 10A fuse,Okay.
So I guess that ruled out accidental overcharge by automatic batt.charger?

As I said,it may be the fuel supply side if that is the case.

Car seems to run fine now with a mix of 89.5 and 92 octane mix.

May take to dealer as favourite mech on holiday.

------------------
Tom 1992 300E 2.6