1. official website: You can visit Mercedes-Benz official website, search the pages of related models, and find the vehicle manual on the pages. You can find relevant information in the User Manual or Technical Manual.
2. Dealer or after-sales service center: You can contact the dealer or after-sales service center of Mercedes-Benz, and they will generally provide the instructions for the relevant models. You can ask them for a copy.
3. Inside the car: Some models may put the instructions in the storage box, glove box or trunk inside the car. You can find the relevant location in the car and see if there are any instructions.
If you can't find the instruction manual, I suggest you contact the customer service department of Mercedes-Benz, who can provide you with more help and guidance.