What's good for passenger road diesel-electric locomotives is good for small diesel-hydraulic switchers, too. Right? Anyway, Vossloh went on the multi-engine trend that Bombardier has shown off with the TRAXX P160 DE ME
The drivetrain is certainly odd: Two truck diesel engines with generators generate electricity, which is then used to power a single electric motor, which then uses the normal mechanic drivetrain of the diesel-hydraulic locomotive. It's certainly a cheap solution, but you don't often see diesel-electric locomotives with C wheel arrangement (instead of Co) these days anymore.
The goal again is to get better emissions. Vossloh is marketing this as the first Euro 5 switcher, which is kind of misleading, since the Euro 5 emission standard comes from road vehicles and does not apply to trains (that would be the Stage IIIB standard, which is more restrictive than the EPA Tier 3), but it's also exactly true, since the engines are from trucks and are Euro 5 certified. It's all a bit confusing.