Vibration And Idle problem
Thread Starter
Newbie
Joined: Mar 2017
Posts: 5
Likes: 1
2008 Mercedes c300 4Matic
Vibration And Idle problem
08 c300, has this rough noice when is on af low idle, and when is in the park and neutral the idle works fine, but when i put it in drive the rpm goes down alittle and vibrates, same thing when i come to a stop the car vibrates and the rpm goes down thats when the vibration happens, i noticed it when is more colder outside it vibrates more than on a nice day, any suggestions? Could that be the Engine mounts?
Senior Member
Joined: Jul 2006
Posts: 277
Likes: 77
From: Alexandria, VA
2000 E430 Sport
M273 engine misfires at idle.
Replaced:
Ignition Coils 2019
Spark Plugs 2019
Camshaft Adjusters 2022
Fuel Pump 2022
Fuel Filter 2022
Intake Manifold Gasket 2022
Decarboned Intake 2022
Fuel Injectors 2022
Knock Sensors 2022
PCV Vent Valve 2022
Motor Mounts 2022
Transmission Mount 2022
Air Pump Control Valves 2024
Oil Centrifuge (Drip Pan) 2024
PCV Oil Separator 2024
No codes and drives well outside idle with a cold start. Idle seems fine once warm.
Cleaned the MAF but may need to be replaced.
Could be OE Tune affecting timing so I'll be contacting customer service for removal instructions.
Have no idea what else it could be:
Cold start after a few days:
Replaced:
Ignition Coils 2019
Spark Plugs 2019
Camshaft Adjusters 2022
Fuel Pump 2022
Fuel Filter 2022
Intake Manifold Gasket 2022
Decarboned Intake 2022
Fuel Injectors 2022
Knock Sensors 2022
PCV Vent Valve 2022
Motor Mounts 2022
Transmission Mount 2022
Air Pump Control Valves 2024
Oil Centrifuge (Drip Pan) 2024
PCV Oil Separator 2024
No codes and drives well outside idle with a cold start. Idle seems fine once warm.
Cleaned the MAF but may need to be replaced.
Could be OE Tune affecting timing so I'll be contacting customer service for removal instructions.
Have no idea what else it could be:
Cold start after a few days:
Last edited by retna7; Jul 5, 2024 at 05:37 PM.
Newbie
Joined: Aug 2024
Posts: 1
Likes: 0
E350 CDI 2010
Is it sorted now? I have the same issue E350CDI 2010
M273 engine misfires at idle.
Replaced:
Ignition Coils 2019
Spark Plugs 2019
Camshaft Adjusters 2022
Fuel Pump 2022
Fuel Filter 2022
Intake Manifold Gasket 2022
Decarboned Intake 2022
Fuel Injectors 2022
Knock Sensors 2022
PCV Vent Valve 2022
Motor Mounts 2022
Transmission Mount 2022
Air Pump Control Valves 2024
Oil Centrifuge (Drip Pan) 2024
PCV Oil Separator 2024
No codes and drives well outside idle with a cold start. Idle seems fine once warm.
Cleaned the MAF but may need to be replaced.
Could be OE Tune affecting timing so I'll be contacting customer service for removal instructions.
Have no idea what else it could be:
Cold start after a few days:
https://youtu.be/08uo6PsvpBc
Replaced:
Ignition Coils 2019
Spark Plugs 2019
Camshaft Adjusters 2022
Fuel Pump 2022
Fuel Filter 2022
Intake Manifold Gasket 2022
Decarboned Intake 2022
Fuel Injectors 2022
Knock Sensors 2022
PCV Vent Valve 2022
Motor Mounts 2022
Transmission Mount 2022
Air Pump Control Valves 2024
Oil Centrifuge (Drip Pan) 2024
PCV Oil Separator 2024
No codes and drives well outside idle with a cold start. Idle seems fine once warm.
Cleaned the MAF but may need to be replaced.
Could be OE Tune affecting timing so I'll be contacting customer service for removal instructions.
Have no idea what else it could be:
Cold start after a few days:
https://youtu.be/08uo6PsvpBc
Newbie
Joined: Jul 2025
Posts: 4
Likes: 0
2011 w212 wagon
I'm gonna revive this thread to chime in with my newly acquired w212 wagon having the same vibration issues. Did anyone ever solve this? Would love to know if there's a solution! Judging by the number of people raising their hands here I'd say it's not a rare issue.
