Some additional info for people who gonna do this job.
It is best not to to hit the bolts to hard.
The allu. is very thin and will break easy.
This is a picture of a rack from a fellow member.
That is the reason I was very carefull with drilling the rusted bolts out.
It took almost a day to do that, because the original bolts are very hard, in fact to hard.
There is a more easy way to adjust the steering wheel after repair.
Loosen the bolt that adjust the slider to the worm.
You can pull the slider down and the worm is free to get in position. (Edit.
Not true for all racks.)
Adjusting this bolt goes best as Anders described, and forget the manual about that point.
Most steering racks on other cars have a tension around 7 nm on this bolt.
This is a safety for a collision that the worm come free by hard impact, so you don't break a thumb or worse.
The Murena however this tension isn't right.
Best is to adjust as Anders described.