I have a 190e that has been diagnosed with a faulty steering gearbox that needs to be replaced. The replacement OEM part is currently unavailable. I located a company that specializes in Mercedes parts that has remanufactured and used gearboxes. Should I go with the used one or the remanufactured one? If I go used is there anyway that I can have it tested to make sure it isn't faulty before it goes in? Thanks in advance.

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