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I hear you that would be crappy to deal with. A decent tech should be able to fix it fairly quickly. A buddy of mine is one of the senior techs and he told me how the find the problem circuit. It is really interesting they have a “brake out box” in place of the obd plug do constant monitoring of the car with the key off and can see what module will not stay asleep. But According to him one module that wakes up will wake every other module up on that circuit. No wonder this is such a problem with all the computers these cars have now

 

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I have a 2015 2.0 MKC and have replaced the battery 5 times. I can't count the number of times I have had to jump it. Anyone else with these battery problems?

Very common. Are you using AGM batteries. If it is dead within a couple days of not driving it after a fresh battery replacement You need service to find the drain. If it takes a year or so of driving after a battery replacement before you notice it is not starting in the morning, use a better battery. Interstate or Walmart AGM batteries are great but I ran an Exide AGM and never had any problems

 

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Relatively simple to find the cause. Remove positive battery terminal. Hook volt meter to the connected terminal and the other to a ground. Read the voltage when the car is off. Should be zero or very low. If its say 2, 3 or 4 volts, you have an issue. With the meter still connected, remove fuzes, one at a time and note changes. Replace the fuze so you dont loose or mix up. Once youve found the offending circuit, you at least have an educated starting point. Good luck!

I wanted to add a little context to the above post. A simple drain can be found as described. Unfortunately, most of the drain issues that the MKC deal with are computer logic issues. Basically a module will aberrantly wake up every so many minutes or hours and then cause every other module to power up, when no communication is heard than they all shut back down. This is the reason I suggested finding a technician to find the drain because you will need to break apart each of the communication lines with a breakout box and then have a multiple channel oscilloscope record the data overnight and assess which communication line is activating. It gets very complex and above my understanding. I have a friend that is a Ford/Lincoln technician and explained it to me though.