Originally Posted by Torquemonster
My bad, I was being lazy. Thanks.
I was sure the V8 had produced more than 481hp though and see the 2010 produced 518hp in the E class (AMG E63) so obviously the C class is detuned likely due to a cramped engine bay and more restrictive exhaust?
Jalopnik - Drive Free or Die
More obviously, the engine being "detuned" is due to marketing in a less expensive model, not due to any design or engineering restrictions.