Yes, I'm not sure often, you need to check your maintenance schedule.
This is a great place to use Mobil One. I put Mobile One in my manual transmission at about 200K, and have changed it a couple of times since. The car now tops a half million miles, and I have done nothing to the transmission.
'84 Euro 240D, 523K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in