Join Date: May 2018
Vehicle: 1999 SLK 230 Bahama Blue, automatic
Other Toys: Team Associated TC3 with Mustang body
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limp mode after warming up
This winter, my SLK230 went into "limp mode" after starting. As soon as I put it in gear, there would be bump and the transmission would stay in 2nd gear. This turned out to be a ATF fluid overflow. After drawing fluid out with a pump, it ran fine for several months.
Now it's doing it again, but only after warming up. It wants to stay in third gear or above (hard to tell which one). The car will drive fine and then after about 15 minutes will give a lurch. Starting from a stop is sluggish, but driving at 30-40 mph is fine. Last time I tested the fluid levels and came out a bit low, so I added a trickle of fluid.
A test this morning has the same symptoms. Perhaps the fluid level is too low?
However, I'm getting inconsistent results reading my transmission fluid. Whether the transmission is hot or cold, I either read very little fluid, or the whole plastic part is smeared with fluid. I can't tell whether it needs more fluid or not.
The Check Engine light came on for the first time ever, too. When I find my code reader I can give more information.