That is a hard one to decide for someone...I traded in my 2002KJ but that is a different situation since it was older.
I will say that I like my CRD better than my 3.7L for more than a few reasons.
Mileage these days is at a premium and I think it will be even more important in the very near future. I have consistently met the estimated City MPG Estimate and surpassed the Highway MPG Estimate.
Driveability is better IMHO. The torque makes in city driving a pleasure in the CRD.
Safety has been definitely upgraded with the Mercedes Influence (and the moustache). The ESP/Traction Control/Roll Over Mitigation/ABS Improvements have created a much better SUV in emergency situations ( maybe your 2005 already has that ).
Alternative Fuel possibilities also factored into my decision with world politics as they are (not saying the "sky is falling" ) today.
Bigger Fuel Tank of 20.5 gallons verses the 18.5 gallons of my 2002 3.7L. Sounds trivial but with the bigger fuel tank and better mileage, I can travel a long way before I need to fill up.
If noise is a concern, the CRD does make a little racket compared to the 3.7L. Even with the Common Rail and Extra Sound Deadening materials added, the noise of the CRD does factor in. With the Radio playing, I don't really notice this at all. Otherwise, everything is better as far as i am concerned with the CRD. Plus the CRDiesel Decal looks great...
