I had the same exact problem they told me our cars came out with two oil pans a 5.5qt and a 6qt but no one new about it until this worker at the dealer that came from germany told the service rep about it ... im getting pissed they trying to open up my engine and replace some parts that bull i didnt go out and buy a new car for them to open the engine u know it will never be the same im trying to make them replace the engine or new car there is no opening my engine.... let me know how things work out for u thanksjaime911 said:I had to take my car in for service at 6,000miles the computer said that it needed 2qts, I added 2qts and then I took it in to the dealer. It turns out that the sensor was malfunctioning, they replaced it. I didn't have anything happen again until I hit 12,000 the computer was registering that it needed first 2qts then later 1.5 qts. San Francisco Mercedes inspected it and it did need 1.5 qts. I had them take care of two things the sensor and my schedule (A) service. I will keep an eye on this oil sensor malfunction, the dipstick that comes with the car has a red plastic tip, I don't like it, seems to me that they made it more difficult to read, wish that they just made it flat for easy accurate reading. Good Luck!