I'm running without it also even though Washington state requires it. Haven't had any problems yuet. Dealer doesn't like installing the front plate but also make you sign a statement acknowledging it is required.
Anyway...
3M make a double sided tape that would probably work. VHB tape which you can find on Amazon and probably at Home Depot. A lot of the air conditioners you see on top of RV's going down the road are stuck on with VHB tape....IE no screws, bolts et cetera so it should be able to hold a plate in place.

 

That was probably me who posted about it. Have had for two years, works well. Two screws underneath and there is a quick pin to pull to remove the front plate. Slide plate and pin it back in and now you have your front plate. Nothing is visible when removed unless you look under and see the small bracket. No holes In front of vehicle for the next owner.

 

I got the sky bracket in for 2025 L460, but it rubs on the paint. Anyone that installed know if I’m doing this wrong?

 

This may not be the solution for rough roads, but I use two Rokform interior phone vent magnet mounts and some magnetic tape on the back of the plate. Just push it on when in high risk areas. So far, it has worked like a charm and no worries of paint or lower grill damage.

 

I’ve never gotten a ticket in many years and many cars of not having a front plate…

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I’ve never gotten a ticket in many years and many cars of not having a front plate…

I've only gotten them in Blue states. Hmmmm