I installed a new computer on my 1997 500sl the last one was not reading my bank 2 O 2 sensor correctly.We thought that was causing my rough idle and multi cylinder miss fire code. After replace the computer the both O 2 sensors seems to switching properly and i have not gotten any miss fire codes but my long-term fuel trim is still off (– 7.5) or so on bank 2 and on (+6.5) or so on bank 1. About the same values I had before I replace the computer. Again no vacuum leaks cleaned and tested fuel injectors, good fuel pressure any one have any ideas?