A 1993 model year car in the US should be a 12V setup, as Jon said. As you drive home, notice the ride quality and evenness of suspension. If it wobbles after it goes over bumps, then a spring or strut may be aged and in need of replacement. I've had it happen. And as a related issue, I've not yet acquired a 164 that didn't need its strut boots and bump stops all replaced, and I've acquired several of them.