Genuine Kaco Engine Bay Lamp.
This one is in excellent+ condition with a black cord and just a couple of paint blemishes which is easy to fix. It looks lightly used.
I have another one with a gray cord and more paint blemishes for less money.

Mercedes 0005830719
Used on Mercedes and Porsche with firewall plugs. Look at the plug in end to see if it will work on your model.