Fix your own car!

I'm trying to sell my car.  It has 94,000 miles and is wonderful.  But my husband wants us to have something a little newer with fewer miles, plus AWD or 4WD for our mountain trips.  So, I listed my car on craigslist and yesterday, my speed and tachometer stopped working.  I was a little disheartened thinking that something was seriously wrong.  Today I took the car by my favorite mechanic and he said he didn't know how to fix it.  He had seen it before, but didn't know what to do.  So this afternoon, I looked it up online, just to check and see if others had the same issue......lo and behold, others not only had the same issue, but there were instructions on how to correct it FOR FREE!!!!  AND THEY WORKED!!!!!!!!!!!  I'm sure it save me at least a couple of hundred bucks on mechanics fees and no telling what else.  So google the problems with your car, microwave, TV, etc, before you call the service person, you may just save yourself some serious dough!