https://www.crossfireforum.org/forum/585345-post1.html Link for crossfire index.

If your key is stuck in ignition the sticky key fix should solve your problem. I have never had this problem myself.

Is that your only problem? Many posts of people having key stuck in ignition and this solves the issue. Many people do it as preemptive maintenance.

I would try a independent European repair shop. Unless you know your mechanic is competent. You need to start somewhere and if it doesn't solve your issue it will not harm anything.

You sound stressed and I don't think you need to be. Maybe someone who has had this problem can chime in.