only because he lifted slightly right as it went into 3rd... mine (E55) will do that too if the rpms suddenly drop right after the blower was just fully spooled up
People need to learn how to launch a car, the CLS 55 has max torque @ 2,650 rpm (516 lb-ft). Push the break, rev it 2,650 or close to it, release the break and step on it. You will have much better 0-60 times this way.