SL55/63/65/R230 AMG: Help adjusting clock 03 SL55

My clock is 3 hours behind, and it's really buggin' me.
Anyone know how to adjust the clock when the stock COMAND unit is gone?
On the 05 you select on the command or turn it off. (time sync) then you can set it manually. pg 149 in the 05 manual.



