Ok... It is a high time for an update.
In the second half of August I found new (I mean "not used") second row from Mk7. It was pretty cheap so decided to go for it. After 400 kilometers I had it loaded
I decided also to find two front seats from Mk7. I found them used 40km from the workshop I bought the back row. I wasn't sure if it is possible to fit them on the original Mk5 base but... whatever. They were dirty (covered by dust) but in really good overall condition. In case of serious problems fitting them I could easily sell them.
After I got back to Warsaw I started planning the back row.
The row is mounted using original Mk7 mounting plates. My floor is a custom made and is over 1cm thicker than standard Mk7. I needed to put 4 plates (8mm thick, 60mm wide and 100cm long) on the floor and additionally smaller 60x60x8mm on them to adjust the Mk7 mounting plates. It can be seen on the picture below.
I also prepared four custom mounting plates to be fixed under the floor. These are made of 5mm steel and goes uder the chassis member ( "U" shape with large "sherrifs" through which bolts go). I think it would be enough strong to keep the row in its place.
Eight 10.9 12x80 bolts later the row was mounted. Hurray. The bad thing is that I haven't got my rubber carpet yet, so I will have to loosen them a little bit to put the rubber finally. It does not seem to be a big problem.
The front seats were much worse. There was much more adjustments and smaller or bigger things to do. First of all I asked friendly carwash to do the magic and make them looking similar to the new second row
They did!
I removed the driver's original seat and started measuring the base and the Mk7 seat.
I decided to remove everything from the bottom of the Mk7 seat and use two 35x35x3mm plates as well as originall bolts and pads. For the thick black bolts from Mk7 I used nuts from the Mk5 seats:
Two or even three iterations of fitting. It is not perfect, the original base is a little bit wider than the adapter plates bolted to the Mk7 seat, but they fit. Of course I can do some welding and prepare more sophisticated adapter. The KISS methodology is best here I think
The old Mk7 rails are to be scrapped:
Need to do some rust cleaning and painting before going further:
Finally - the driver's part is ready:
Passenger side was not so simple. The single seat has completely different base than driver's one. Fortunatelly I had my old drivers base I kept after replacing driver's seat couple of years ago.
Originally Mk5 single passenger seat rails have different placement of bolts than the driver's ones.
I had two ways: got some RHD driver's rails or weld in some plates and drill new holes. I even wanted the first solution, but getting rails from RHD in a reasonable condition is almost impossible here in Poland. The only thing I had to do is to weld in two plates to be able to adjust the bolt holes.
Two plates, 4 holes, 5 minutes of rust cleaning and here it is:
After another 2 minutes of painting and 30 minutes of waiting I was able to mount the seat in plate.
And here they are
Next step: finish the floor, dump all the stuff I gathered during the work I will surely not need anymore. I want to stay with one box with tools and one box with necessary stuff.
After that - CLEANING. The dust is everywhere