Are the armrests on my E34 interchangeable? I ask this because on both, the top side is worn, but I'm wondering if I can turn them 180 degrees (worn side down) and switch the passenger side with the driver's side. So, basically I'm asking if the armrests are completely asymmetric ..... I hope I'm making sense. If so, I can switch them, and the worn side would be down on each one.