DStrole

I need some help!! I over filled my 2006 ML350's engine oil this evening (about a quart as shown on the dipstick). The only reason I noticed was that as I drove home, about 2 miles, I noticed smoke coming out of the engine compartment. I stopped, near home, opened the hood and on the left (passenger) side of the engine there was oil dripping all over the place. Now it is about 2 hours later and a lot of oil is dripping underneath the car. What is up? BTW, I am in the process of draining the extra quart of oil out of the engine.