Here's how the cylinders are numbered:
* 4-cylinder engines:
* #1 cylinder: On the right side (as viewed from the front of the car) and closest to the front.
* #2 cylinder: On the left side and closest to the front.
* #3 cylinder: On the left side and furthest from the front.
* #4 cylinder: On the right side and furthest from the front.
* 6-cylinder engines:
* #1 cylinder: Right side, closest to the front.
* #2 cylinder: Left side, closest to the front.
* #3 cylinder: Left side, middle.
* #4 cylinder: Right side, middle.
* #5 cylinder: Right side, furthest from the front.
* #6 cylinder: Left side, furthest from the front.
Important Note: This numbering system is consistent across most air-cooled VW models, but it's always a good idea to double-check your specific engine using a repair manual or online resources for your year and model.