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Mercedes-Benz ML320 Rough Idle

Learn if it's a simple fix or time to seek out a trusted technician.

What are common reasons my Mercedes-Benz ML320 has a rough idle?

While there are a variety of reasons your Mercedes-Benz ML320 has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
34%
of the time it's
Vacuum Leak
21%
of the time it's
Spark Plugs
15%
of the time it's
Ignition Coil

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Related Mercedes-Benz ML320 Questions

See what others are asking about their Mercedes-Benz ML320. Get answers from RepairPal's community of auto experts and enthusiasts.
It idles rough and shakes badly. what advice do you have for me.thanks.
2002 ml320 does not crank. when jumped idles very rough. battery shows 12 volts and 13.6 when running

Related Mercedes-Benz ML320 Problems

Find the most common driver-reported problems that are to blame when a Mercedes-Benz ML320 has a rough idle.
The crankshaft position sensor may fail. symptoms of this are: the engine will crank—but not start—especially when ...

Mercedes-Benz ML320 Rough Idle Repair Symptoms

A failing ignition coil will create misfires in the engine, and lead to hesitation, extreme power loss, engine stalling, poor fuel mileage, and illumination of the check engine ...Read More
As we discussed, spark plugs are necessary for any gasoline engine to run. When they fail, the engine is in a constant state of attempting to ignite air and fuel, but cannot. Th...Read More