Which Karcher pressure washer?

[DotFifty89]

Hey im in need of a Karcher but I cant decide which to go for.

Mainly will be used for cars.

Not sure what pressure I need, but I don't think I need a very high one for cars, im not sure.

They can go up to hundereds of pounds but I don't get the difference.

I am willing to pay up to hundereds £250 but only willing to pay that much if the quality is considerably better than cheaper ones.

Thanks guys.

 

[DotFifty89]

Yes the k2 does look pretty good, just wondering, do I iust plug it into the outdoor tap and go? Because I thought you could put some sort of detergant inside it