I would first try bending a hanger so that it has a 1" hook at the top and fish around under the seat. If that doesn't work I'd loosen the 4 bolts enough to rock the seat up alittle and then use the hanger. there is no reason you pull the seat OUT of the car, unless you just want to. (Carefull, it is heavy.)
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Noah
1999 C43
4Noah