This Mercedes model utilizes a combined breather and oil separator housing that incorporates the PCV valve. However, the PCV valve is not a serviceable component and is not sold separately. If you are experiencing problems related to the PCV valve, the entire housing will need to be replaced.
Symptoms of PCV failure
Symptoms of PCV failure can include:
* Reduced fuel efficiency
* Engine idling problems
* Engine misfiring
* Check engine light on
If you are experiencing any of these symptoms, we recommend taking your 2001 Mercedes ML320 to a qualified mechanic for diagnosis and repair.
