I'm not starting a flame war here, but the 3.5 From Chrysler is a good engine but its power band is not as evenly spread as the MB 3.2. I've driven many Pacificas, 300's and Magnums with the 3.5 as well as the old 300M and the engine felt like a 2.7 Liter 200 hp V6 not a 3.5 liter 250 hp and 250 torque engine at all. Also any MB engine will far outlast any Chrysler engine with proper maintenance anybody will tell you that. Thats what MB is known for other than safety and innovation. Their engines are bulletproof especially the 500 (5.0 liter) which now is being upgraded to a 550 (5.5) not to be confused with the supercharged 55.

As a longtime owner of MB products and many MBs in my family all I can say is the that the car may fall apart over many years of use but the engine will be purring like new and just be breaking in at 100K miles. We just got rid of a '89 260E with the 2.6 Liter Inline 6 that my family bought new in 1989 and the engine had about 212,000 miles and you would fire that engine up and it was as smooth and quiet as the day we bought it with no smoke or rattle or vibration and the body held up with the doors closing with the solid thunk of a new MB. Its not uncommon to see a Benz with a couple of hundred thousand miles on their odo with the original engine.

I'm not bashing Chrysler in their engine dept., they do make good engines and they do last a long time with proper maintenance, but a Chrysler engine with 150,000 miles is nearing the end of its life while the MB unit will be solid and ready to provide many more miles without hesitation.