The history of the small shunting locomotives in the Kö I family goes back to 1933. To move few wagons or to operate smaller works connections, many locomotive factories built two-axle locomotives with diesel engines, mechanical gearboxes and chain drives that were able to travel at a maximum speed of 23 km/h. The Deutsche Reichsbahn-Gesellschaft DRG ordered machines of the so-called standard design, most of which were equipped with a 30 or 39 hp Kaelble F125 engine. The locomotives were used by both German State Railways until the 1970s.
| Key | Functions | Sound slots | Volume CVs | Volume values |
|---|
| F0 | front light | | | |
| F1 | sound on/off | 1 | 259 | 128 |
| F2 | exhaust whistle | 3 | 275 | 170 |
| F3 | exhaust whistle (alternate) | 4 | 283 | 128 |
| F4 | shunting instruction #1 (moment function) | 7 | 307 | 90 |
| F5 | parking brake set/parking brake release | 13 | 355 | 70 |
| F6 | acceleration/brake time, shunting mode/shunting speed | | | |
| F7 | curve squeal | 15 | 371 | 128 |
| F8 | AUX1 | | | |
| F9 | compressed air let off | 9 | 323 | 50 |
| F10 | shunting instruction #2 | 18 | 395 | 120 |
| F11 | coupler clank | 8 | 315 | 100 |
| F12 | shunting mode | | | |
| F13 | shunting instruction #3 | 20 | 411 | 120 |
| F14 | shunting instruction #4 | 22 | 427 | 120 |
| F15 | ESU smoke unit | | | |
| F16 | sound fader | | | |
| F17 | brake function | 25 | 451 | 125 |
| F18 | shunting instruction #5 (brake apply/brake release) | 19 | 403 | 120 |
| F19 | sanding valve | 11 | 339 | 40 |
| F20 | shunting instruction #6 | 23 | 435 | 120 |
| F21 | flange squeal | 24 | 443 | 128 |
| F22 | rail clank | 17 | 387 | 90 |
| F23 | shunting instruction #7 | 21 | 419 | 120 |
| F24 | disable brake squeal sound | | | |
Make sure that index CV31 is set to 16 and index CV32 is set to 1 before changing a volume CV.