use mine, (karcher small yesllow model aprox 3bar pressure 1ltr cap.) for interior, seat spot cleaning, enginebay cleaning, outside plastic, great for removing residue on plastic, for wheel arches, ect.
Kärcher Steam Cleaners are a revolutionary approach to cleaning your home - we've harnessed the dirt-shifting power of pure steam to deliver extraordinary cleaning performance from nothing more than tap water. With no chemicals or scrubbing, a Kärcher Steam Cleaner effortlessly removes tough grease, everyday dirt, stubborn stains and even limescale and mould from tiles and taps.
If its for external car cleaning then you could consider a pressure washer instead. Of which, there are a wide variety.
I have burned my way through 2 Karcher SC1020 steamers which were great at the time... until they fell apart. I now use a cheapo Lidl steamer which I think is better built and does a better job. Truth is that I only use steamers now on certain stains/spillages etc. as a tornador is now my tool of choice.
The Karcher is fine for occasional use inmo, but a cheaper item can do just as good a job.