These engines are nice. On paper their performance look close to the M130. But in real life, fore having driven both, the torque and power of the M189 is better spread over the rev range and the noise is a fantastic one, nothing to do with the one of the M130 (which sounds like a sowing machine). Technically, it's a very beautiful piece, but quite complicated and very expensive to overhaul. Putting a M189 with manual trans in a 190 SL would be a beautiful combo.