My 09 MKX still has the original Purge Valve. (But then I never top off.) 

I understand them engines if built in the Cleveland plant have a problem with the head gasket for water intrusion. Mine has about 65K Kilometers and so far so good.

Yes, it is the 2.0L.  I got the car a few years ago with around 75K on it I think.  My son drove it for a couple of months before he bought a new car, and put a lot of miles on it.  So far I have not had any major problems with it.  I just got the rear camera recall done on it, and had the hood struts replaced.  I replaced the battery a couple of years ago.  Other than that, just regular maintenance.  It is just over 100 K on it right now.  I don't drive it a lot since I retired, but it is a great little car so far.

That is true but at least with the key, it isn’t a gimme like finding the fob and being able to start it and drive away.

Did you buy it new?  I have a 22 ST that I factory ordered and picked up myself at the dealer.  The 22 ST did not come with the engine cover.  It is one of the things they started leaving off, like the glove box light, when they knew they were going to stop making the Edge.  It also didn't come with the hood insulation either.  I bought that through the parts department at the dealer, but decided I was fine without the engine cover.  The dealer verified and I checked other 22 STs in their lot and none came with the engine cover, so I bet yours never had it.  There were several topics on this forum back in 22 about it.  

thx helpful then it had to be the dealer. 

The cover does not have to be removed to change the oil.

PS -- does a cover need to be removed to access the filter or change tyhe oil? or would it have to be something at the dealership? it would help with tracking it down!

I think I know the answer but.....after getting some advice here so I can start doing my own oil changes, I popped the hood and.....it looks like the last person to left off an engine cover? there's three threaded bosses that look like they take one. it's only been to the dealership, and the oil change place next door. thx john p 

Started the car with a booster and drove to Ford dealer, will be ready today or tomorrow. Hope for the best