Kalkhoff Agattu (e-bike) Panasonic 24v engine dead - worth repairing? UPDATE:

http://www.kalkhoff-bikes.com/en/bikes/e-bike/e-activity/agattu-impulse-8-hs-8-g-1.html

I went with one of the above. It's not a 2016 model though. The Impulse 2 drive is awesome. 



My three year old Panasonic crank engine just gave up the ghost recently. 

The dealer says that the engine shorted the battery and vice versa. So I'd need both components as new or used.

The battery costs 600EUR or less depending on capacity.
http://www.amazon.de/Derby-Panasonic-Motoren-Kalkhoff-Ladegerät/dp/B007GBD8RS/ref=sr_1_1?ie=UTF8&amp;qid=1450190851&amp;sr=8-1&amp;keywords=e-bike+batterie+24v+panasonic

The engine I could not find at a glance.

So my question is. Do you think it is worthwhile for me to try to fix the electronics of the engine / replace the battery of a 3 Year old bike that was used daily for climbing hills. Or rather just get a new bike that costs 2600,-EUR with newer technology. Impulse 2 system from Kalkhoff.

And would it make sense to remove the engine and use the bike as a non e-bike instead? 

Update:

Just to clarify the battery seems to be charging fine in the charger. Pressing the check charge button works as usual. Only when the battery is in the bike, pressing the check charge button makes all charge lights on the battery flash in sync. So I do think the electronics on the engine are gone.

Also: 
                
              this looks like the motor and the electronics are one part that can be swapped.

So the question is, do I want a brand new bike with brand new technology or refurbish a well worn 3 Year old bike with an aluminum frame  that had several falls, lot's of pot holes and one accident running from behind into a car.

Since aluminum does tend to just break without much of notice I'd rather go with a new bike even though it is a heavy investment. The e-motor on the new one and the whole riding experience is superb.
First up - I know nothing about your specific bike model.  However 3 years is a pretty good run for batteries especially if used for hill climbing, and it could be they're just past it and need replacing.   

600 euros sounds a lot, but its one of the consumables.  Do you know how far you're ridden?  10,000 km would be 0.06 euros per km, which is a lot cheaper than a car.

Its highly unlikely the battery shorted the motor and the motor shorted the battery killing both.

If you're handy, try and find two working 12V batteries (car ones would do) and hook them up in series to the leads, with your powered wheel off the ground.  Do mind the polarity and watch for shorting.  The bike should run like normal on 24V.  For this test, battery type doesn't matter but current will need to be at least 10 amps so small batteries are unsuitable. If this works, the motor is fine.  You might be able to use a mains PSU adapter, provided it supplies 24V DC at 10-15 Amps.

If this doesn't work, the motor or controller may be damaged and you need some more skilled local help.  Google about for an ebike retailer or specialist in your region.

Best to google about for a replacement battery pack or find a battery specialist who can repack your existing battery.

A bike is not a cellphone to be replaced every couple of years, with normal maintenance it should last for decades.