That’s just the normal procedure to check your oil on a German luxury car

could also be an Audi owner doing timing work on one of those engines with the timing chain at the back of the engine

Narrator: “The day he decided to check his car’s oil levels was the last time he was seen alive. And when the wife was suspicious of the smell of the rotting dead body, it was already too late.” dramatic music

Warning! Crude pun in title!