Fuse box 1 is located under the hood, on the driver's side. To access it, open the hood and look for a black plastic cover with the word "Sicherungskasten" (fuse box) printed on it.
Fuse box 2 is located in the trunk, on the left side. To access it, open the trunk and look for a black plastic cover with the word "Sicherungskasten" printed on it.
The fuses in both fuse boxes are labeled, so you can easily find the one you need to replace. If you're not sure which fuse to replace, consult your owner's manual.