To be certain, you should:
* Consult your owner's manual: This is the best resource for the precise location.
* Look for an air tank: The compressor will often be near the air suspension's air tank.
* Listen for a hissing sound while the suspension is cycling (if possible): The sound can help you locate the compressor's general area.
Remember to be careful when searching – some parts of the car may be hot. If you're unsure about working on your car's suspension, it's best to consult a qualified mechanic.