The fuse burns for the door locks and antenna within a few uses. I even increased the rated amp a little higher and it still burns prematurely. Could it be a short? The antenna is a little messed up. Could the fuse be burining because of a motor that straining somewhere?

Thanks
I have a 1989 300E

 

Yup there a faulty ....check on the wiring or the item itself and do check the volts to the vacuum pump locks, radio and the ones which burned out as per mention ..