i have an 86 300E with about 175,000 miles in it. i just got done putting a refurbished head on, deck cut, valves and guides. got the old girl running and all topped off and set to go. the tranny wont up-shift even at 5500 rs. checked out the switches and linkages and didn't find much off there. disconnected the tans pressure cable and no diff. run Through all the vacuum lines and connections and didn't find any leaks. pulled the hose off the vacuum. modulator unit and no ATF so that's at least not leaking. tried to go through all the arcane linkage adjustments. talk about week info out there BTW watch the Cd's out there for the 124s. mine has an incorrect wiring order in it!! it's original MB and got it on ebay.
anyway, not too familiar with the Benz as this is my first. any of you Benz guys out there have some help for me?? is the modulator stuck? something else? did i miss the linkage setup setup? would love the help jim