Folks - come on - we all know this is not really about having a light in the engine but about having something cool that was made during the era of the car for this function.
I also sometimes use a $1000 iphone as a flashlight in the engine, but then remember that it costs 100x more than a flashlight if i drop it. So usually, I use those cheap LED lights that can be dropped and work great.
BTW - I also have a Kaco light and also got it through SAMBA. When you find the same part under VW, it seems to cost 1/2 as the same part under Mercedes. I think I paid about 70euros for a new-old-stock one in the box.