The ER20 has all axles driven and electrical pickup from all wheels. There are two traction tires.
Lighting is directional with 3 forward and 2 rear lights (unlike the Piko Hercules models which have no rear lights).
Paint is crisp, as is detail. The locomotive sides are painted differently - one with the "Arriva" logo and the other with the "ALEX" logo.
There is a small bag of parts to be applied to the locomotive although some details such as the metal handles on the front have already been mounted for you - these appear to be metal and therefore appear realistic in thickness. For reference, Tillig normally supplies such handles as plastic pieces to be applied by the modeler and since they are plastic, they are un-prototypically thick.
The drive is very smooth and quiet - top notch.
The bag of extra parts includes two traction tires, 1 motor brush and two springs (for the motor brushes or coupler mechanisms?).
There is no quick plug for a DCC chip but Kuehn's website details (in German) what needs to be done to add one. The manual may also comment on this but it's in German so I'm not sure. I expect adding a DCC chip to be a relatively easy thing to add since Kuehn also manufactures them and it would make sense that their locos are ready for them.
Axle and bogie dimensions are the same as the Piko version of the Hercules.
Kuehn's version of this locomotive is a step above Piko's in detail and mechanics.
The wagons are Kuehn's version of the Silberling which is closer to prototype than Tillg's. The wagons are all 2nd class with unique running numbers.
Small details are already applied - no parts bag.
The paint and detail is very good. As with most modern passenger wagon models, the bogies are electrified for future addition of lighting.
Rolling resistance of the wagon's is up to modern standards.
Couplers on all four pieces is BTTB style but shorter to allow for more realistic spacing. The couplers are easily replaceable with Tillig versions which I am sure will cut the coupled distance by a millimeter and bring it more in line with Tillig spacing.
The manual consists of three pages - one for the wagons and two for the locomotive, all in German.
This set was my introduction to Kuehn products which I have become very fond of.
