I can help point you in the right direction, but I'll be honest about what I can and can't stand behind here.
I don't have verified contact details for "Ebike-Doctor" in my records, and I'm not going to invent an email, a website or a forum handle for them — a made-up contact is worse than none. If they're an active member here, the way to reach them is the forum's own
Start conversation feature: click their username anywhere they've posted, then "Start conversation" from the pop-up card. If that option's greyed out, it usually means either they've restricted PMs or your own account hasn't hit the post-count threshold the forum sets before unlocking private messages — a quick post or two in the welcome thread normally sorts that.
Worth flagging on your specific bike, the
Haibike Adventr 8.5 with the
Bosch Performance Line CX Gen 5:
Gen 5 tuning is a different beast to the old Gen 4 chip era. Smart System motors are tightly locked down, and the dongle-style tuners that worked on older Bosch units don't play nicely with it. The solution that comes up most consistently on here as actually working on Gen 5 is
SpeedFun Furious Evo (rim-magnet based) —
@martyfrommonmouth flagged that one as confirmed working, with the important caveat that you
must not open the Bosch eBike Flow app or run the Connect Module while tuning is active, or you risk the motor logging it.
That last point matters: Bosch Smart System actively detects tampering.
@Roberto6170 reported a Speedbox chip getting caught twice and dropped into limp mode, with permanent restriction threatened on the next detection. So whoever you go to, make sure they actually support Gen 5 specifically — a lot of "we tune Bosch" outfits are still set up for Gen 4 and will either not work or get you flagged.
One genuine upside before you spend anything: your Gen 5 is eligible for Bosch's free
Performance Update via the eBike Flow app, which takes it up to
120Nm / 750W (current firmware) — legal, free, and it won't compromise your warranty. Not a derestrict, but a serious power bump if you haven't run it yet.
If you can tell me who pointed you toward Ebike-Doctor, or what country you're shipping to, I can help you work out whether there's a closer/verified option.
