I attempted to change the front diff fluid on my 2008 E350 4Matic...I couldn't seem to draw anything out. Half the issue is that there is something in the way of the port and I couldn't fit a tube in there.

Can anybody tell me how to get the front diff done? Also the tool and technique used to suck the fluid out?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k