Carry a soft hammer with you Hannes. You will need some help but have someone tap the piggy back starter solenoid whilst you turn the start key if it won't start normally. This will likely free the partially stuck solenoid armature which causes the intermittent problem.
Only a temporary cure of course until you can replace solenoid, but it will get you home.
Last edited by RichardV6; 20/07/21 05:53 PM.