Is it possible to play with an orchestra as an amateur (in Berlin)?

[paxxx17]

Hello fellow musicians, I'm an amateur pianist with 20 years of experience, currently living in Berlin. I'm practicing Beethoven's 4th concerto and would like to play it with an orchestra here, even if just in a rehearsal setting. Does anyone have recommendations for local orchestras that would welcome guest soloists, or advice on how to approach orchestras about this opportunity? I would be happy to provide a video of my playing so they can see whether I would be a good fit. Any general suggestions, or recommendations of specific orchestras to contact would be greatly appreciated!

[busondelssohn]

I know of a Czech one that might but I guess that's not much help 
I'm an amateur and had this plan to do a Haydn concerto with an mixed orchestra (Austrian and Czech, very laid back) but it never really came to fruition.