C250 1996 Automatic Transmission Oil Change

I have bought a new filter for an oil change - possibly the first after nearly 190,000 kms. No guidance in workshop manual but presume should be straight forward ie Remove dipstick, drain oil, install new flat filter
unit and top up with 5.5 litres of new oil through dip stick tube. Any tips regarding procedure and best oil grade etc. I understand automatics do benefit from fresh oil every now and then. Thanks

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