Черный мерин [chernii merin] literally means “black gelding,” but in Russian slang it refers to a black Mercedes-Benz. In the song, this memorable phrase symbolizes the powerful luxury car that the crew drives around in, making it a vivid cultural and vocabulary highlight.
"Чёрный мерин" (Black Merc) is pure car-bass bragging, and it does not pretend to be anything else. Мерин literally means a gelding, a castrated horse, but in Russian slang it is a Mercedes-Benz, so the whole hook "За рулем черного мерина" (Behind the wheel of a black Merc) is about cruising in a dark, expensive German car. The opening sets the tone straight away: "Пол в газ смело, тут бас стелет" (Pedal to the floor, boldly, the bass is laying it down), then "Заряжаем гелик и мы полетели!" (We gear up the G-Wagen and off we fly!). Гелик is slang for the Mercedes G-Class, and "Черный АМG раздул компрессор" (The black AMG pumped up the supercharger) name-drops Mercedes' performance line, so Gazan clearly knows his cars.
The rest is the crew and the sound system. Братики (little brothers) and пацаны (the lads) are his friends, "как звери" (like beasts), and they ride "от зари до зари" (from dawn to dawn) "как дикари" (like savages). The bass is so heavy it squeezes you "будто бы под прессом" (as if under a press), and there is a funny line where the lyric literally mixes alphabets: "Звуки разлетаются баssбоsтеd" (The sounds fly out bass-boosted). Fun slang to steal: кроссы (sneakers), дал-дал (floored it, literally "gave, gave"), and стелить, which normally means to spread something flat but here means to flow or glide smoothly. Tinted windows "темнее ночи" (darker than the night) and xenon headlights that слепят (blind) you finish the picture. It is a bit much, and that is exactly the point.