Hi DRM and welcome to the Lincoln MKZ Forum. The answer is a qualified yes. According to what method we use to lock the vehicle, it can be "normal". For example, we can lock our vehicles with the keys inside if we simultaneously press the 7/8 and 9/0 keypads. This is explained in the Owners Manual. How did you lock the vehicle?   Good luck. 

Recently I inadvertently locked my key fob in my 2014 MKZ.  How it happened: I opened the trunk lid with the button on the dash.  Got out of the car and locked the doors with the key fob inside. The car did not signal via the horn or automatically unlock the doors (smart unlock).  I was eventually able to unlock via the keypad on the door.  Is it normal that the trunk being open disables the smart unlock feature? Seems odd.

https://a.co/d/6GslUqU   This is the part you need in the link above. Fuel injector pressure sensor. Autozone has the incorrect part listed for this fit. Get it on Amazon. $16 part at the time of this post. You just need the correct size long socket to fit over it. Done. Plug n play. My stalling issues went away. 2014 lincoln MKZ 2.0L. I've had the vehicle since Sep of 2017 and it's great. ABSOLUTELY TRY THIS FIRST! Good luck. 

My car is don't this currently. It also did it for a few weeks amour 2 months ago, but then it just stopped. It started back up doing it today. So I need to do anything? Or not do anything? Is there a fix for it?

Hi, Mine does the same thing. 2018. Brought into Ford dealership and they said it's normal. I asked if they have checked the transmission fluid though it's a sealed case, I have read online that being a 1/4qt low it can cause these issues. They said they checked it and say it's full. 2nd time me bringing it in for the same reason. We have a 2018 Ford truck that was having similar issues and adding a little bit of transmission fluid actually helped. But, none the less, the dealership did not fix it and so I will be getting it back again with the issues still existing. I have 40k miles on this car and noticed it originally at 30k. Mines most noticeable from 1st to 2nd gear. 

My husband and I are on our way to look at a 2011 hybrid MKZ!  We've done a ton of research and appreciate this forum!  I was concerned with the hybrid battery being 14 years old but I'm feeling better after reading up on so many positive experiences.  At this point, hubby is more concerned with the lack of horsepower 😅

I want black wheels on mine as well but don’t want aftermarket.

Here we go, hopefully this will give you a good idea...   Below is a picture of a Ford Edge panoramic roof side piece, very similar to ours.  The trim is removed, but you can see the square boxes, which the part will attach on to.   Bottom of the pic shows which side he lifted up to start prying the part off, which would be opposite side of the double sided tape also used to secure the part in place.     Next pic shows the MKZ part which shows a close up of the area that will attach on top of the similar box located on our MKZ.   (** Now I can only assume how this works here, and how I would go at it. **)     Those attachments run along the front 7 across, with cushioning spacers in between.     Here is a whole view shot.     So basically the double sided tape is on the rear side of the part with the rubber strip.  So initially I'd start to pry from the front / forward side, start on one end and gently pry until the first attaching box (first of 7) pops off.  Then proceed down the line until you can feel only the taped area pulling up.  It'll get easier one after the next.  An Auto interior Trim Removal tool will probably work best, don't want any scratches.   The side pieces are similar, of course.  But, there are 5 attachment boxes and four cushioning spacers in between.  No tape is on the side parts. Should be pretty simple, good luck and let us know how it goes.  Pictures are appreciated.

Looks like a good replacement there, best of luck with it.

Hi kramf411. Sorry to see you go, and best of luck with your new vehicle!