Thank you for all the advice!
I am attaching some photos.
There are 3 cracks.
It looks like I need to remove some of the rails to be able to get to the whole crack.

I am not so sure how to drill at the corners that do not have cracks without removing the sunroof arrangement - any advice?
Maybe a dremel it instead?
Also one of the crack is under a GPS antenna that is stuck with a black glue and it looks like it will break before it will give... I will try to remove it with a string tomorrow.

I found two cracks on the roof. See attached photos.
I drilled hole to stop the crack (maybe I a bit bigger than it should have been) and am now considering how to repair the cracks. I have come up with 3 options:
 - ABS gluing - there are these ABS sticks and a heatgun at the local Hornbach
 - Marine silicone -
 - Marine 1 component polyurethane -

Ultimately I should remove the roof and re-enforce the panel from the back with a steel grid and then fill it with something... but this is really not something I have time for. So what would be the next best thing?

Am I really only delaying the need for removing the panel and fixing this properly?

 

Thank you!
The pictures are great!

Thank you - don't have such card yet.
But I have a RS485 adapter that I may try to connect and see...

I am restoring a car with a missing 12v battery holder.
I was hoping to build the bracket out of laser cut steel or reinforced acrylic plate.
So I need to build a model of it.
Any help is very appreciated!

I am attaching a composite of what looks like isometric view of the bracket.

Thanks for that answer!
True, but I am troubleshooting a broken charger and I can not help but wonder if the damages to the charger would have been much smaller if the fuse was a fast fuse.

I am helping restore a Think to a working order and found that the fuse for the 230VAC input is blown.
It seems it is a 15A slow fuse (time delay)...
What is the reasoning behind using a slow fuse? Inrush currents in charger?
I am considering replacing it with a 20A fast fuse, so it actually can protect a charger and other electronics.
Any advice would be appreciated.

You are correct!
I was thinking of the belts and airbags system.
But why would the PCU want to hear from a power steering if your car does not have one?
Please try with sending the message on the CAN bus and see if the PCU is still complaining.