'no experience with the 190's

'first and most dreadful thought is that your lock cylinder is trying to go south
on you.

If your assessment of the lack of final start position attainment is correct;
order a new lock cylinder from a "stealership" with your V.I.N. (about $80
,comes with one new key)and do a search here for the proceedure.

If the cylinder goes bad and you are unable to achieve position #1 with
your key(and insert correct diameter wire to release cylinder)
you will have avery unhappy ,expensive day.