When considering a 2006 Mercedes Benz E320 CDI, you’re essentially looking at two distinct diesel experiences depending on the engine under the hood. The earlier models of the 2006 E320 CDI came equipped with the OM648 engine, while later models transitioned to the OM642 with BlueTEC. This difference is more than just an engine code; it’s a shift in the driving and ownership experience.
Driving an E320 CDI with the OM648 engine is often likened to the classic diesel feel, reminiscent of older generations but with a significant power boost akin to a 90s V8. You get the characteristic diesel sound and a more visceral sense of acceleration. When you press the pedal, you hear the engine respond, and you feel the gear changes. For those who appreciate a more hands-on approach to car maintenance, the OM648 offers a significant advantage. Under the hood, the layout is relatively accessible, making tasks like fuel filter and oil changes, along with other basic maintenance, achievable for the DIY enthusiast. The simpler braking system, avoiding the brake-by-wire SBC system found in some contemporary models, is another point of relief for those wary of complex electronics.
Conversely, the BlueTEC variant with the OM642 engine offers a more refined, modern driving experience, often compared to a gasoline V6. The diesel sound is significantly muted, and the 7-speed transmission keeps the RPMs low, resulting in smooth, almost imperceptible shifts. The torque is impressive, delivering effortless acceleration across the speed range. However, this sophistication comes at a cost for the DIY mechanic. The engine bay of the OM642 is considerably more complex, making self-servicing more challenging.
Ultimately, choosing between a 2006 Mercedes Benz E320 CDI with either engine type depends on your priorities. If you value a classic diesel experience with accessible DIY maintenance, the OM648 is a compelling choice. If you prefer a smoother, more modern driving experience with potent torque and less engine noise, the OM642 BlueTEC might be more appealing, though be prepared for potentially more complex servicing. Both offer the renowned Mercedes Benz quality and diesel efficiency, just delivered in distinct flavors.
