91 320i how to change the clock

hi just purchased a 91 320i bmw and i cant change the clock on the computer bit on the dash where the engine check and everything is. have a friend with
a 95 318i with the same display bit and he cant change it either its the model with the long screen and a set of 4 buttons to the left hand side with 1, 10, 100, 1000 on them have tried to consult the owners manuals but are in japanese and cant read it please help!
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on my 323 you chage the clock up in the speedo there is a button to the left of the trip reset
hope that helps
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- Press CLOCK key until "Input Time" appears in the left-hand display and the dots flash.
- Input correct time - Press SET/RES. The clock will start to run
For the time display:
1000 is the input button for tens (hours) 100 is the input button for ones (hours) 10 is the input button for tens (minutes) 1 is the input button for ones (minutes)
The digits can be input in any order. Each time a key is pressed, or every half second if it is held down, the value increases by one.
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