This is embarrising. I have owned a 1983 300SD since 1988 and I completely forgot how to change the time. I must be working too hard. Thank you

I just did it over the weekend. There's a little reset depression on the face on the right side of the radio. Just push it in and use the numbers across the top to dial in your time.

83 300SD 177K
84 300SD 223K