All cars I have ever owned have had 3 back seats. I have never driven a car with arm rests in the back, not sure if that would be on anything smaller than a minibus.

It might be that the European and US markets are very different here...dunno
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Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock