There are over 1000 Mercedes-Benz buses serving Bangkok. These are the dominant models that can be easily found on the streets of the city:

Blue A/C high-floor buses: Mercedes-Benz OF1617, there are 200 of these buses serving zone 1, 2, 3, 5 and 6

Orange A/C buses: Mercedes-Benz OM441LA, there are 400 of these buses serving zone 1, 2, 3, 5 and 6

White A/C articulated buses: Mercedes-Benz O405G, there are 52 of these buses serving rt.145 and rt.511

White A/C buses: Mercedes-Benz O405, there are 38 of these buses serving rt.503