MB 190e Mass Air Flow Sensor

This is a two part question: 1) My recently purchased 190e (1990) runs well but it seems slow to pick up from a complete stop. I feel I have to floor it and even then, it just lacks pick up; instead, it very slowly and steadily accelerates. I've been told and done some reading to confirm that this could be an issue with the mass air flow sensor. I also know this is an older car, very heavy etc. and I may just not be used to the feel of it but my gut is telling me it should pick up more quickly. 2) If that's right, how big of a deal would it be for me to clean/replace the mass air flow sensor? Direction towards any tutorial would be greatly appreciated, of course.