I had to open my mouth & brag about my new 540i!
Took it away for the weekend, stopped at Mac D's for some lunch on the way. Enjoyed(?) my bigmac then tried to set off. Turned the ignition, all the lights came on & nothing. Tried resetting the immobiliser and still nothing.

Eventually got in touch with the previous owner (Hi Trevor, if you're reading! ) and he told me about heat soak. He said it had been a problem with this car before & he'd replaced the starter motor because of heat soak.
I'd much rather not replace it again, so any ideas on why my car is prone to it and how I can solve it? If replacing the starter motor is the only way, is it a job I can do myself?

Spent a lot of time in a car park with my bonnet open this weekend, which cheered the wife up plenty, as you can imagine!

Any thoughts peeps?

Ben