3-valve technology allowed the catalytic converter to reach its optimum operating efficiency temperature 12 seconds earlier than in a 4-valve design, hence less emissions. That's the reason MB went with 3-valve technology. The addittion of twin spark plugs per combustion chamber had the added benefit of a cleaner combustion yielding more torque and decreasing fuel consumption.

I got this information from one of my many Mercedes-Benz Bibles at home.

What they did lack was enough side support

I think chairs with side support are more comfortable than chairs without it. BMWs sportchairs are more comfortable than standard ones IMO. So a car should have chairs with side support IMO.

PS I dont like this model at all but the review was nice to read.

I am not a fan of the R-Class either, but I think I can see the appeal of this car. It really does perform well as a family carrier and long-distance cruiser. The design could have been much better though.

At least the interior looks nice.

Hopefully the facelift with be much closer to the Visions, that is if they don't discontinue the model by then.

there is some rumour that the R class will get a update for model year 2008 with 7 seater available and the R class might become rear wheel drive to bring the price of the vehicle down and so attract more customers

Nice review but the car still hurts my eyes! Aaaarrrgggh!

That would be a welcome. Redesign the front and rear and the car wouldn't look as bad - if they get it right.

True that the goal was for emission purpose. (and nice diagram by the way...is there a English version of the book?)

Just that when I drive with the 3.2 litre "3-valver", it feels more like a Japanese engine, sans the Saxonic feel.

I got the book at the Mercedes-Benz Customer Center in Sindelfingen. Only saw German versions of this book.

Another awesome write up by the Wimmer!