Wow.
Faster than the SLK350, the SLK320 CDI is quite a ride.
Quote:
Three turbochargers in the SLK-Class
The SLK 320 CDI tri-turbo is based on the new V6 diesel engine, which achieves new levels of performance thanks to a two-stage supercharging system. It consists of three turbochargers, of which two are located on the outside next to the cylinder banks while the larger third turbocharger is situated between the V of the cylinders. At low engine speeds and loads, air flows through all three turbochargers (i.e., large and small), with the small turbochargers doing most of the work. When engine speed increases and the flow is continuous, the large turbocharger takes over supplying the greatest share of the charge pressure and the smaller turbochargers are turned off by means of a bypass system. At high engine speeds and loads, only the large turbocharger is running. Performance is further heightened as a result of an enlarged intercooler and larger pipe diameters for the charge air and the exhaust.
Here is the link:
http://www.cwwcardesign.com/mercedes_slk320_cdi.html
A lot of nonsense is talked about performance diesels. Yes they are fast, but they are also unsatisfying. The short power band and flat torque curve do not provide the same driver satisfaction as a smooth high revving six or eight cylinder petrol engine, and being heavier, they generally affect the handling balance of the car. If you have to have a diesel, then I'm sure it won't be slow, but so what? I'd take the 350 even if it was slower. And that's still 'if' at the moment.