The locomotives of DRG Class 98.10 (Baureihe 98.10 and, unofficially, the Bavarian GtL 4/5) were superheated steam locomotives with the Deutsche Reichsbahn-Gesellschaft.

However, because they were very slow with a top speed of 40 km/h (25 mph), the design was modified and the so-called GtL 4/5 was built with an additional trailing axle, that was linked to the final coupled axle by a Krauss-Helmholtz bogie.

The remaining engines were manufactured by the newly created firm of Krauss-Maffei in 1932 and 1933.

In spite of the extra carrying axle the top speed could only be raised to 45 km/h (28 mph), so that later rebuilds or new engines were based on the GtL 4/4 (the rebuild becoming the DRG Class 98.11 (1′D)) and LAG Nos.

All 45 locomotives of DRG Class 98.10 passed over to the Deutsche Bundesbahn after the Second World War.