What model car do you have Ethan?

My M104 C36 had the same problem as you described it it was the boot ends under the coil pack that was the problem. they are like $10 each.

Good luck.

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1997 Silver AMG C36
OEM Advantegarde Grille
OEM Clear Corners
W210 Blinking mirrors
Eibach/Bilstein Combo
Zender Rear Lip Spoiler