Google dates the track to 1977; appearing on Kraftwerk's Trans-Europe Express album. With Kraftwerk it is maybe easy to overlook the simplicity of their equipment (in relative terms), because they didn't use conventional acoustic or 'rock' instruments. A general rundown of their equipment, by era, can be found here:
Kraftwerk Frequently Asked Questions and Answers
More specifically they list the following equipment for 'the late 1970s'.
Equipment used in the late 1970's included:
- 2 "Synthanorma" 16-step custom-built analogue sequencers built by Matten & Wiechers
- Farfisa electric piano
- custom-built electronic drum pads
- Moog Minimoog
- ARP Odyssey
- Orchestron (see the separate entry below)
From this list we can rule out the Orchestron, which was basically built along the lines of the classic Mellotron and used by Kraftwerk for string and orchestral lines and pads.
The bass line could be coming from either the Moog, the ARP Odyssey or even the Farfisa electric piano (potentially a 'Professional Piano' model). Farfisa electric pianos are fully electronic, rather than electro-acoustic like a Wurlitzer or Fender Rhodes, and in the lower register they will sound quite like the bass on this track.
The repeating sequence could be coming from the ARP or the custom sequencer listed above. The bell-like phrase highlighted in the original question sounds like Moog or ARP work, with a patch set to have quite a metallic edge to it, possibly with two oscillators, one set to a higher octave and slightly detuned. It could potentially be the Farfisa piano, treated or driving some sort of synth hardware. Both the sequencer and the lead synth lines are both treated with tape echo; possibly a Roland RE-201 Space Echo as listed elsewhere on the site above (and period correct for 1977).