Bypassed the 850 coil and connected one from an old 740 and it fired straight away! Can only assume it had a power surge when we reconnected the battery. Put it down to experience. At least all connections etc. are clean ready for winter cold and wet. Now off to Europarts to price up a new coil but ...

The battery on my '96 850 T5 was disconnected for 3 weeks whilst on holiday and, when we got back we couldn't open the doors either on the electronic tab (expected) or the manual door key. Only way to get in was via the tailgate and climbing over the seats to pull open the bonnet to reconnect the ba...