Assuming you mean the PCV (positive crankcase ventilation) valve, yes.
The headlight is not a part of the emissions system.
Yes.
Yes, the 2002 Mercedes-Benz ML320 has a PVC (Positive Crankcase Ventilation) valve, which is part of the engine's emissions control system. This valve helps regulate the flow of gases from the crankcase back into the intake manifold, reducing harmful emissions and improving engine efficiency. If you suspect issues with the PVC valve, it's important to have it inspected or replaced as needed for optimal engine performance.
YesYes
Yes, it is an intercal part of the emissions system.
No. Normally is is considered part of the fuel system.
No. The muffler is a passive component in the exhaust emissions system.
Yes it is part of the emissions system. It turns exhaust into lower emissions by burning any unburnt exhaust gases thus reducing unwanted emissions and Carbon Monoxide.
Pvc is not part of a vehicle, but the pcv is a one way valve for venting the crankcase ( Positive Crankcase Ventilation ) This is on a vacuum hose connected to the valve cover and leads to the intake.This is part of your emissions control system and should still be covered by the factory warranty.
Yes
yes
Catalytic converter