Wanted to throw my question in here too since we are on topic --

I bought a used Behr FC off ebay (it was dirt cheap)...

Works great, but does not disengage, ever. It is locked all the time. What's the deal? Probably just need a fresh one?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k