99 ML430 - 13 328i
Went to Pepboys and bough CRC MAF Sensor cleaner, battery cleaner and battery terminal protectant. cleaning the sensor was a piece of cake. sprayed both sides about 15 times, let it dry and sprayed some compressed air over it on both sides. i went for a drive and i did not see a change in MPG at all and maybe a small increase in response but very minimal or none... i guess my sensor was good.