ML shudder when turing

[Dennis Lines]

Questions from a newbee ML and 4wd owner.
I just purchased a '98 ML320 and notice that the vehicle has a shudder went making tight turns and applying the accelerator. Is this something to take to a dealership to have checked or is this normal as someone told me.
Both driver and passenger inside door panels have several of the "snaps" that hold the panel to the door popped out from around where the front speakers are located. Seems to me that the speaker is a very tight fit against the door panel. I was planning on removing the door panel and installing new clips. My question is can I remove the door panel without disturbing the air bag in the door and are there any precautions to removing the door panel.
Thanks for any assistance and or advice.