wont shift out of park sometimes

I get the same problem with my 2003 Mercedes S430. When I start my car and try to shift into reverse, it locks up and I can't move the shifter. Then when I turn off the car to try again, it works. It has been a big pain as I have to start the car, try to shift, turn off the car and start again to shift into reverse. Appreciate any new info to this problem. RichP

Sounds like your having problems with the shift lock system. There are a few reasons this may be happening, so it's best to have it looked at by an experienced MB tech.

Just my luck I made this $1200+ repair last month @ MB of LB -- parts required were the Shifter, Pin, and Lock. Removel and replacement are made inside the car. It did not look hard for a DIY, I was going to do it myself; however, I was not sure the shifter replacement was the answer. And I would not have not been prepared/aware of the lock and the pin replace. Hope you can diy and save - good luck