I was able to reach the voltage regulator despite my short arms. The screws were not tight. That made it easier. The stacks are worn but I'm not sure if they are worn enough to cause the problem. Only Mercedes has the part locally for $107 plus tax. So I'm in a bind. Take a chance on the part at a rip off price or tow the car. Any advice?

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1993 Benz-190E-2.6 liter