Good morning!!! Need a little help and assistance regarding my 2000 Volvo S80. Climate Control and heated seats have no power. Checked all of the fuses and they are all fine. Volvo mechanic did the same yesterday. He stated the same thing. He tried to pull up codes and got no response. He feels that it is the central electronic module that is the problem. Believe it is under the dash? \r\n\r\nCar has 160,000 miles on it and if possible, would like to replace it myself. Where is it located? Is it possible for me to do it? Would a used one be acceptable? Is there a software update needed after it is replaced? Mechanic mentioned this yesterday. Thanks!