Here's my opinion:
1./fix command should repair both truck and trailer, and you can use it anytime without waiting.
2./fix shouldn't be available in EU1 server. Because it's a server about simming, which you have to pay for your fault like in the real world.
3.Introduce a new command called /fixoverturn, which will make you recover from overturning. This command only works if your truck overturned.
Just my 2 cents.