Did some searching and here's a suggestion. You have a fuse box in the engine compartment that looks like the picture below, only turned 180 degrees.
The "E" relay is called the ASD relay. Take out the ASD relay and replace it with the horn relay letter "A" and see if you get your gears back.
If that doesn't work, did you get an engine light when it went into first gear? If so, we'll need the code for further diagnosis.