is probably the common translation, but I've also seen emergency seats and even one-mile seats

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Note added at 2003-04-03 15:56:47 (GMT)
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\"The Facel Vega used the same type of high center console and individual front seats one traditionally found in sports cars, but it also carried a luxurious-enough occasional seat in the back.\"

http://www.theautochannel.com/publications/magazines/sci/apr...

\"Out of our esteem for Earl, we asked him to set the pace on the tour and some of us had an extremely difficult time keeping up with the breakneck pace he established, especially Elwood Manteno who drove his prepared TR4 on the trip. With Jake, Paul and Jerry sprawled out in the occasional seat of my car, the performance suffered a tad.\"

http://snic-braaapp.org/iart98.htm


\"Your rear seat is now ready for many more years of faithful service as a storage area come occasional seat.\"

http://www.mgcars.org.uk/cgi-bin/gen5?runprog=mgoc&p=emg/fit...

(This is talking about the MGB and I remember what a squash it was in the back of there as a child - I wouldn\'t have wanted more than the occasional ride!)