1. Sticky Ignition Key.
FIX THIS NOW, before you are sorry. It takes about an hour, but if you let it go, it takes all damn day and you WILL be sorry.

Order a spare Crankshaft Position Sensor and carry it in the truck.
https://www.germanautosupply.com/sto...sensor-86.html

If the car has the original white "Varta" battery (and it almost cant after ten years) - change it TODAY.