It could. Throttle motor and throttle actuator are the same thing. They have other names for it too, depending on what literature you're referring to.

It electrically controls the throttle plate (throttle-by-wire, in other words, MB had this over 10 years ago!). If there is a internal problem, it could slam shut under certain circumstances and give you a hesitation or skip. I suppose under certain circumstances, like the throttle plate angle not matching what the quantity of fuel is that's being injected, that it could cause at least what would FEEL like a miss. Remember this is just allowing air into the engine, it's NOT a carb, the fuel injection is still doing it's own thing. The fuel being sprayed in and the throttle plate angle have to correlate.

Gilly