Know it is not MB but let me throw something out there. I've got a 03 BMW 530i in the shop with Service Engine Soon light - slipping transmission code. The car has 159k miles on it and the transmission has never been serviced. I'm concerned that a filter/fluid change will kill it in short order. On top of this there is a service advisory out on the torque converter regarding a worn seal inside the TC. Car runs and drives out good.

Any thoughts/comments in regards to which way to go with it?

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Jim