A/c issues

About a year ago I bought my daughter a 2011 Mercedes ML350 recently the air conditioning has been acting up so I took it to the mechanic he told me it was the compressor and it was $2,000 I started looking through the car and found that the blower motors  fuse  was missing. I replaced the fuse but the fan is still not running, and the compressor look to be working. How can I get the fan runnimg again , it hasn't had a fuse for over a year , at a minimum?