ðə mɜːsˈeɪdiːzbˈɛnts ˈɛm wˈʌnhˈʌndɹɪd θˈɜːɾi sˈɛvən ˈɛndʒɪn wʌzɐ nˈætʃɚɹəli ˈæspɚɹˌeɪɾᵻd, sˈoʊk sˈɪksti dᵻɡɹˈiːz vˈiː twˈɛlv ˈɛndʒɪn, wɪð θɹˈiː vˈælvz pɜː sˈɪlɪndɚ.
The Mercedes-Benz M137 engine was a naturally aspirated, SOHC 60° V12 engine, with three valves per cylinder.