How often should it be done? Ever 15k miles?
What is the purpose? I know mine has not been done in 40k miles atleast.
WHen the car is off and I push the gas, I can hear a metal on metal type sound from the throttle within the engine. Mine needs lubing!
What should I use? How do I do it? This is for 95 C280 with M104 motor. Do I have to remove the air intake crossover pipe? Please help, thanks.