I happen to use a Stearns electric oil change pump. It was about $35 and runs off the battery.
I get the vast majority out of the engine, and the ease of doing it makes that job fly by -- about 20 minutes.
I look at the underside of the car as well.
There is another thread about this topic and is on a 126. Owner did both types of draining procedures -- pulled plug and suction. Suction got more oil out by a number of ounces. He has photos of the results.
Either way, change it hot and often and you'll be fine. A few extra ounces will certainly not hurt your new oil. Even if you let all the oil drain overnight, there is still more than you think up in the motor.