My C240 struggles to start when the outside temps drop below the 40s. Sometimes pumping the throttle helps and it starts. Other times I have to pull a battery connection off and let the computer reset and then the car starts. I do not have any check engine lights currently. After it starts and I drive it, it will start normal the rest of the day.

Any idea on what could be causing the issue? I just recently, put new spark plugs and O2 sensors in it.

Respectfully,
Barry

How old is your battery?