Thanks to its gas-gulping V-8, the E550's EPA fuel-economy ratings--15mpg in the city, 23mpg on the highway--are on the low side for a midsize sedan. In practice, we found that it performed at the high end of the scale, getting an average of 20.7mpg in mixed, freeway-skewed driving. The E550 scores less well on the EPA's midsize car emissions table: at 10.1 tons of greenhouse gas emissions per year (10.5 for the all-wheel-drive 4Matic), the E550 is among the top five emissions offenders in its class..



Link: CNET