Car Does nothing after hooking jumper cables backwards

Thank you Joe, I'll try, but everything I look up says I probably destroyed some relay's and/or control module when I hooked the jumper cables on backwards. Please help. Used module? It is a 2007 Mercedes Benz E350. I don't want to spend more on repairs then the car is worth. Thank you for your reply. Sincerely, Gregory

Joe, one more thing I forgot to add on the 2007 Mercedes Benz E350: Ever since I hooked up the jumper cables wrong (reverse positive cable on negative post), the car won't do anything: The key won't turn in the ignition, the car won't recognize the key, the windows are down and won't roll up, the sunroof is open and won't close, no horn, no nothing. I know I fried the battery, so I had someone jump me correctly: The trunk lights came on, but that was all. Nothing, including the key doesn't work, nothing works. Everything I read says I most likely ruined come type of control module. I don't want to spend more on the car then it is worth. Help please! Used module? Any suggestions? Thank you for your reply. Gregory