Oil should be changed at least once a year. MB specs 13k miles or one year changes. So MB doing millions in R&D over the last century have determined that with Mobil 1 fully synthetic you need to change the oil once a year regardless of mileage.

I change my oil twice a year regardless of mileage.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200