Why would your 1987 560sl engine skip and run rough?

A 1987 560SL engine may skip and run rough due to several reasons, including faulty spark plugs or ignition components, which can disrupt the combustion process. Additionally, issues with fuel delivery, such as a clogged fuel filter or failing fuel pump, could lead to inconsistent fuel flow. Vacuum leaks in hoses or intake manifolds can also cause irregular air-fuel mixture, resulting in rough running. Lastly, problems with sensors or the engine control unit could affect performance, leading to engine skipping.