W210 Misfire

[Davidash]

My w210 E280 V6 has a misfire at high revs (About 5000rpm). I have changed the plugs, the filters and cleaned the MAF but still have the problem. Any suggestions as to how I might find the cause of the problem?
Thanks

 

[Ian B Walker]

You say you have changed the plugs. Have you got the plug leads on the right plugs and are they secure onto the plug? Might be a good idea to get the codes read too.

 

[Davidash]

Thanks for that. I marked the plug leads before removing them to make sure I put them back correctly. I have had the misfire for quite a while - well before I changed the pluG. I asked the agents to check some time ago but there were not a great help. We have a Bosch service facility nearby. Do you think their diagnostic kit will identify the problem or is it something only the agents can fix?