mabiera

I purchased a 2008 C300 4Matic with 55,000 miles on it about a month ago. I recently took my car to the dealership to get a few things done, including having the check engine oil sensor reset. A few days later, a notification that read "Check engine oil at next refueling" appeared, and has appeared on and off since then. I had the dealership check this again and they mentioned that the intake manifold needs to be replaced in order for this sensor to work correctly (and apparently other sensors will be effected in the future). Is an entire intake manifold replacement necessary for this? Any thoughts would be helpful. Thanks