If you were needing the hitch to provide a mounting point for a bike rack, we do have options available for you.
The 2020 Mercedes-Benz GLA is the first year of a new generation, and unfortunately the hitch manufacturers haven't come up with a hitch fit as of yet although I'm told there will be some fits available by mid-spring. Unfortunately, the # C13294 you'd mentioned is a fit for the previous generation GLA class and wouldn't be a fit for your 2020 model.
If you were needing a hitch... view full answer...