Hmmmm, I’ve been thinking about this one…. the problem is that it’s far from easy to get the meters out on a P2, and once they’re out it’s a watchmaking job to install a new light.
I have to recommend that you either return it to me and get my specialist chap to fix it, or use it as it is!
I don’t mind fixing it; the cost is my standard charge of £25 plus the cost of returning it, so the whole bill for you would be £38 (I’m assuming that you are in Germany).
There’s no quick fix. 