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Acceleration flat spot

1K views 0 replies 1 participant last post by  Nitro88 
#1 ·
1989 560SEL with 150,000 miles runs very well, burns little oil and gets 19mpg average. When I wind it up (WOT) I feel there is a place beginning around 4,000 rpms that seems to just flatten out. If I back off, to a little more than half-throttle, it seems to have more thrust. In any case, I have not run it all the way to where it automatically shifts because I'm usually too busy looking to where the car is headed. I've done this several times in the recent past but can't tell if it's just my imagination or if there really is a flat spot.

My question is: Have any of you felt this in your 560???
Any ideas as to why, ....
and is there a fix?
 
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