Electronic idle control // Leerlaufregeler shot — no replacement found — photo attached.
We have diagnosed a high idle RPM to this piece, which we plus a local mechanic cannot find. The removed piece had no serial number, and other sites refer to idle controls with valves that aren’t a fit. Had anyone seen this before and know where a replacement could be found? Is it even original? Any help is appreciated.
My partner and I in Berlin bought a beautiful blue transit camper in 2024. 1989 MK3 - I believe 2.0 57kw version.

