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Discussion Starter · #1 ·
My slk 230 99 is running rough on idle anyone have any ideas what it could be,changed plugs leads and coil packs not sure if its right to post this in this section any help appreciated thanks
 

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Mine was running rough at idle hen in drive or reverse,, not missing but just rough. After changing plugs and adding the Techron, it seem to be better.
I think I still need motor mounts also.
G
 

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