Is there a simple fix for this problem besides leaving the center belt unfastened from the floor? When I lower the back seat the center seat belt extends, but two times out of three it won't release when it comes time to pull the seat upright. Each time I've had to take the seat belt loose from the floor. This is becoming a real irritant. Volvo parts or service was no help. If I replace the whole center seat belt assembly with one out of a wrecked 98 V-70, would this cure the problem? Am at a loss of what else to do. Dick