Already had those things done...
The sparkplugs in the car were replaced a few months ago, along with the fuel injectors. Does anyone think the fuel filter could really cause this to happen after sitting overnight? The check engine light is also on, the Mercedes dealership resets it everytime I bring the car in but returns a week or so after being reset. Could this be the cause of the hesitation, possibly a fuel pump going bad? Thanks for the previous replies.
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