Hi Amybeth - 'Compressor' is a device that squashes or squeezes, e.g. air compressor. 'K' then takes the place of 'C' to give you 'Kompressor' which is a car model (Mercedes).
You will often find clues like this here on the AnswerBank where two words have different spellings but sound the same, like time/thyme, etc. This is a constant battle of wits as you will soon discover. Have Fun! ☺ja