Instead of trying to do it yourself, take your car to a qualified mechanic or a transmission specialist. They have the proper tools and knowledge to perform the service correctly. This includes:
* Identifying the correct type of transmission fluid: The 300M's transmission requires a specific type of ATF (Automatic Transmission Fluid). Using the wrong fluid can damage the transmission.
* Checking the fluid level correctly: The fluid level is checked while the engine is running and the transmission is at operating temperature. This is crucial and can't be done accurately without specialized equipment and knowledge.
* Identifying potential problems: A mechanic can diagnose any underlying issues that may be causing low fluid levels in the first place. Simply adding fluid may be a temporary fix masking a bigger problem.
If you are determined to check the level yourself (strongly discouraged unless experienced), you'll need to locate the transmission dipstick. It's usually near the engine, but its exact location can vary. Consult your owner's manual for the correct dipstick location and instructions. Remember, even checking the level requires the engine to be running and at operating temperature, which is unsafe for inexperienced individuals.
In short: Take it to a professional. The risk of causing damage far outweighs the potential savings of doing it yourself.
