Anything except super glue. It will screw up lenses. I use a scrap piece of donor abs plastic and soldering pen/iron.
The rally panel has difference that comes into play here. Because it has its voltage limiter in the fuel gauge, that one gauge is grounded. What does that have to do with this bezel topic?
There are two scenarios. One is a collision, I wont go there. The other...
There have been cases where 1 of the 4 gauges stopped working, someone noticed and started tapping on the lens. Eventually that tap was hard enough to break the factories melt stakes. The metal matting frame fell back against the gauges, short circuiting the ALT" gauge ( which is fire cracker hot ) to the fuel gauge. The needle of the fuel gauge lights up like a bulb element and turns to ash instantly. Can put a nice burn scar in that screen too. I've got two examples here if you want pics. Or you could search for the one members thread about it happening to him. I've been here about 8 years, seen this event posted only once. Proves the chit does happen though.
Bottom line... silicone, epoxy, whatever most everywhere else. Secure the lens and matting frame at the 4 gauge pod as strong as possible.
