A Place For Tank Caps
You go to the gas station, open your gas tank and now what? Where shall you put the cap? If you did not know it before then you will be happy to hear the solution for this question.
There is a little knob on the gas tank cover which shall hold your tank cap while you fill up the tank. If your car does not have such a knob anymore then you still have the possibility to buy a spare part on the internet or you can ask the staff of a garage to order the right one for you.