Yes, that's right. I change the original boxpleat to flatpleat.
If you want to read my story :
When i bought the car i thought the boxpleats are Ambla. The previous owner also said they are Ambla.
I checked the glove box, the door panels and the side faces of the seats and this was leatherette, so i believed the owner.
When i googled "3500S" and "Ambla" i allways saw the boxpleat surface.
Originally i thought every boxpleat is Ambla, and every leather is flatpleat.
When a 3500 to cannibalize was offered near my hometown almost 2 days later, i took the chance and bought the whole interior because i wanted leather seats, and the flatpleats there were in good condition.
During cannibalizing of the interior, i noticed that the door panels and the glove box paneling was leatherette.
I talked to the owner and confronted him with that because he told me his interior is "real leather" on the phone, then he told me to have a closer look on the wood trims...
Every old test review or classic car review wrote about the quality of the interior. Especially the german classic car magazines praised the "feeling of british club room"
with fine leather and fine wood placed in the interior....
This was the point when i found out some things on the interior:
- The wood in the doors and dashboard isn't wood, it's a (well done) fake
- Only the seat surface is leather, the door panels, the glove box panel is leatherette
I was really a little dissapointed at this moment.
Later at home i found out that boxpleat is not automatically Ambla.
Now I checked my "new" flatpleat leather seats and i noticed, they almost feel the same as my boxpleats, which i thought to be Ambla.
I was surprised by the quality of my "Ambla", i thought: Hey, what a great fake! They feel like leather, they smell like leather and even the bottom looked like leather...
Still in mind, i must have Ambla (because the previous owner said that) i started searching through this forum.
Then i noticed there are 2 types of backrest covers. A thin type for leather seats, and a much thicker type for Ambla.
Now i know that i already had leather seats...
if i knew that before, i wouldn't have bought the flatpleats.
After comparing both seat types, i decided to restore the flatpleats. They are in better condition.
....