clk55 Engine quiry

[DavidCLK55]

Hi, I have a 208 CLK 55 ......the problem i have is at 1000 rpm the engine is rough and tends to oscillate between 800 and 1200 when in park under load it seems ok it's been twice to the Benz service dept but shows up fine on the diagnostic's. They did try changing the MAS but that made no difference. Just wondering if anyone had any ideas as they dont ....Thank you David from Downunder

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[RJC]

Originally Posted by DavidCLK55

Hi,
I have a 208 CLK 55 ......the problem i have is at 1000 rpm the engine is rough and tends to oscillate between 800 and 1200 when in park under load it seems ok it's been twice to the Benz service dept but shows up fine on the diagnostic's. They did try changing the MAS but that made no difference.
Just wondering if anyone had any ideas as they dont ....Thank you

David from Downunder

It's normal fro the engine to idle somewhat roughly in park/nuetral as compared to when it's under load, but it should not oscillate 400 rpm's, that's about 350 too much. Have you dealer call up the MB tech support line for assistance.