Mostly while the car is still cold, the transmission pops into neutral after full-throttle acceleration. Instead of upshifting after the downshift, the trans goes into neutral and puts itself back into gear only after coming to a complete stop. Happens every time full-throttle is applied. About 6 months ago the center console became wet after leaving the sunroof open. I'm wondering if a faulty shifter is the culprit? Also, a local indy mechanic replaced the trans fluid w/ Redline ATF instead of the MB-specified fluid (I should have specified fluid choice) about a year ago...