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Mercedes-Benz 190E Rough Idle

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

What are common reasons my Mercedes-Benz 190E has a rough idle?

While there are a variety of reasons your Mercedes-Benz 190E 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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See what others are asking about their Mercedes-Benz 190E. Get answers from RepairPal's community of auto experts and enthusiasts.
Changed the plugs and wires due to skip this fixed it but very hard too start cold. this problem happens all the time
Hello. i've purchased a '93 190e in great condition with the exception that it is running rough and seems to misfire...

Mercedes-Benz 190E Rough Idle Repair Symptoms

A failing ignition coil can create several symptoms: Check engine light comes on Engine runs poorly or stall Increased emissions Reduced fuel economy Car won’t start I...Read More
When spark plugs fail, the engine will struggle. The check engine light will come on, and it may appear either solid or flashing. The driver would likely notice one or more of t...Read More