Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hello my name is XXXXX XXXXX i will do my best to help you.
well since you have the 4 cylinder all you have to do is open the hood and look at the passenger side manifold and follow a few inchecs down and you will see the upstream sensor and whem you veiw from underneath you will see the downstream sensor. you will need a 22mm wrench to remove and usually come out with a few taps. no need for torches and such they rarely seize into the exhaust. both oxygen sensors are located in the exhaust pipe and are easy to access . i can get pictures tomorrow and post to you but they are super easy to get to.
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