Shifting problems on 1992 Mercedes-Benz 300TE

My husband worked on my car couple weeks back replacing the stabilizer arm and now my transmission is not changing right. What could he have done to it?

Asked by for the 1992 Mercedes-Benz 300TE
1 answer
The boden cable may be out of adjustment, goes from the accelerator linkage to the transmission or did a vacuum line get disconnected?