i have a 1989 260E an was wondering if anyone knows if the 2.6 liters transmission bolt up to a 3.0l engine the motors look the same and please list any problems i might have doing this swap

Since the block is essentially (I think it might be identical) on the 2.6 as the 3.0....the transmission is likely the exact same unit.

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You may need to check very carefully with this. I have recently changed the transmission in my 260e. I was led to believe that the transmissions are different between the 300 and 260 engines even though they are both M103 blocks.
My replacement transmission was sourced from a 190e 2.6.

thanx for the info guys would i need to do anything else if i got the 3.0l engine an trans or could i just put it in without aditional work thanx