!989 mercedes 300E Blower fuse

[raye321]

I was reading on here about someone with a similar problem as mine. My heater blower quit. Last summer I lost high but still had med and low. Now no blower at all. I have it apart down to the blower motor. I put 12v to the motor and it spins. I cant find the blower regulator, is it under the blower motor? I found the fuse, small black box on drivers side in front of fuse box. It is a metal strip fuse which I am not familiar with. How do I know if it is bad? It's not broken however I did look at it a few months ago and it was straight. Now it is a bit wavy. I checked for continuity and it did have some but i'm not sure how to tell if it is bad. I would like to replace it where can I get a fuse like that?