Hi brian, welcome. I'm Steve. And I will be assisting you today. Do you mean RDX? and is this the center arm rest or the one on the door panel ? if you are not sure just post back the vin Number. I can send instructions and a part number with the vin.
yes it an rdx
Ok, Its not really that hard , Open the lid and you will see some screws in the bottom. remove these and pull the plastic cover off and then remove the screws under it that hold it to the hinge. Here is the diagrams from the manual. Click this link. https://dl.dropboxusercontent.com/u/89860259/arm%20rest.pdf
If there is anything else I can help you with let me know.
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thats the problem there are no screws