Is there anyone with Climatronic A/C and heated seats (controls as pictured below) who could check which fuses they have installed for the seats?

The manual show three possible fuses (2 x 5amp, 1 x 30amp).

I only have a 5amp fuse installed at position 4, but I think I should also have the 30amp fuse for position 37 (and possibly the 5amp in the bottom row of fuses, can't remember the number).

Basically, neither of my heated seats appears to be working. I'm wondering if the previous owner pulled any fuses and didn't replace them. I'm currently assuming (hoping for) a common fault rather than both elements having gone e.g. something was causing the fuse to blow and he removed it rather than fix the underlying problem.

In the worst case of both seats elements having blown, any idea of costs to replace?