Try it and see, it won't do any harm - the job of the fuse is to be the weakest link to protect everything else.
If you exceed 13A from 230v supply, the fuse will blow.
Will be alright on the car body and worst case on the chassis (depending on the material thickness) may blow the fuse.
And congratulations on buying/picking a really great mig too...really is a great little machine and hard to believe what it can do given the small size/weight of the box.
I've even run mine on full power off a 13A and it's been fine.