thanks for the answers.

Bob C-

I'm not sure if it's the same for all models, but on mine the cable is located with the throttle linkages, on the driver's side, back of the engine compartment, partly covered by the air cleaner housing and near to the oil filter. There should be a cable that looks like a bicycle brake cable with a white plastic adjuster. You should be able to get to it without having to remove the air cleaner.

If I remember rightly you turn it towards the firewall for higher, more 'sporty' rev changes, and the other way for quicker, lower rev changes. I set mine to change up at around 2500rpm with 'normal' pressure on the gas pedal. Took a few trys to get it to my liking, but I think it needed about 2 &1/2 turns in the end.
I made a mark on the adjuster and counted each full turn too, just in-case I messed it up

Hope this helps.

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1993 320TE M104
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past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
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"music and women I cannot but give way to, whatever my business" -Pepys