How many oxygen senosrs? and how do you remove the air filter? on 2000 Mercedes-Benz E55 AMG

how many oxygen senors does this car have? and how do you replace air filters? does the air filter housing have to be removed from the engine?

Asked by for the 2000 Mercedes-Benz E55 AMG
1 answer
there are four oxygen sensors, and yes, the air filter
housing must be removed to access the two air filters
that live inside.