Ha... just when I think I'm done w/ options/accessories, they pull me right back in!!!
On any other make/model, such a novelty would seem kitschy. But, it looks like it belongs on a CLA w/ its neat LED-DRLs, star-like chrome Sports package grille, LED light-bar taillights, and optional illuminated door-sills.
Definitely adds to the modern look & unique appeal of such an offering. I think it looks cool, kinda/sorta like the angel-eyes on BMWs, jeweled-LED headlights on newer Acuras, etc.
I'm sure there will be an after-market kit for those who wanna save a few bucks and/or their MB market doesn't offer such an accessory.
For the optional illuminated door-sills, it's almost like spend ~$850+ w/ MB or less than half that for after-market/ala-carte (DIY installation). Though, I think this illuminated star would require an applicable grille.
With all that said, it's these very minutiae details that truly distinguish & separate one's self from the crowd. The LED-DRL headlights, light-bar taillights, illuminated door-sills, ambient headrests lights, chrome-tip sports grille, illuminated star, etc. Very noticeable & appreciable touches that would endgender "oohs" & "ahhs"...
Point-being, the CLA is a special offering & I think such things befit it.