Under the hood of this four-door is an updated version of the 3.0-liter turbocharged inline-six that now produces 443 horsepower on its own, an increase of 14 horsepower over the previous generation thanks to a new turbo, revised engine software and increased cooling capacities. However, that engine is now augmented with a 161-horsepower electric motor integrated into the nine-speed automatic transmission.
Total system output is a strong 577 horsepower and 553 pound-feet of torque, and it sends said power through anPerformance 4MATIC+ all-wheel drive system. Engage “Race Start” mode (launch control), and the electric motor will apply a temporary boost up to 604 horsepower. Using this extra boost,says the E 53 can do the 0-60 mph sprint in just 3.7 seconds (or 3.9 without) – top speed is electronically limited to 174 mph, too.pack, though Mercedes says only 21.2 kWh is available for everyday use, while the rest of the capacity is programmed to wait in reserve for you to use as electric boost “during high-performance drivin