HI there,
Thank You for the donation,
I would have the transmission tested by a dedicated transmission specialist and preferably one with Benz experiences, if the transmission as be idle for some time, internal seals and dry out, crack and shrink, this can cause internal pressure leaks with in the hydraulic system the controls system pressures, a specialist transmission tech can do a series of tests to determine if this is the case, do not use any transmission additives that offer magic fixes as they can cause more problems along the way.
Mark (mhpautos)
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Monday, September 20th, 2010 AT 4:01 AM