[Cemessi]

Could be the ignition switch? Vantaa might have an idea.

 

[feeblebob]

Had major issues with mine on this that got worse over just a few weeks. The terminals on the starter motor had corroded. They're right underneath the car and apparently the underbody covers don't do a really good job of protecting it. Take the terminals off and clean them to get a good connection, and check condition generally of wiring.

Confusingly, I had this in conjunction with a suspected battery draining issue, so I thought the battery was continually effed but it was in fact this problem with the starter motor, quite separate.

 

[Perrodulce]

Thank you guys, I will check that out and report back