CVT continuously variable transmission it's supposed to be serviced by dealership only. However, there is a way to get around having the dealership check your fluid level.
Just purchased and aftermarket transmission fluid level dipstick.
Follow the instructions that come with it and you can add or change your CVT transmission fluid.
****WARNING*****
Make sure you only use approved CVT fluid for your vehicle. If you use ATF fluid or one that is not formulated for your vehicle, you could destroy the transmission.

I purchased this Chrysler Dodge Jeep transmission dipstick tool from Advance Auto Parts online. After discounts it cost me $13.00 and change.

This dipstick may be used with Dodge Charger, Magnum, Pacifica, 300, Avenger, Sebring, Caravan, Town and Country, Caliber, Jeep Compass, Patriot, Dodge Nitro, Jeep Commander, Grand Cherokee, Liberty, Dodge Journey and Volkswagen Routan.