What does the Chinese word benzi mean?

"Benzi" is not a standard Chinese word. It's possible you might be thinking of:

* 奔驰 (Bēnchí): This means "to gallop" or "to race," and it's also the brand name for Mercedes-Benz in Chinese.

* 奔驰车 (Bēnchī chē): This literally means "galloping car" and is the common name for a Mercedes-Benz car in Chinese.

Could you please provide more context or the full phrase where you saw "benzi"? This would help me understand what you're looking for and provide a more accurate answer.