1995 Mercedes-Benz S500 Q&A

1995 Mercedes-Benz S500 Question: My back doors won't open. The locks come up, but doors won't open. What's wrong?

The doors seem permanently stuck close for some reason. Can you give me a clue to what's going on and how much it might cost to fix. -
Answer 1
Both doors? Wont open from inside or outside? -
Comment 1
That's right, neither inside nor out. -
Answer 2
sounds like there are not unlocking all the way. seek diag and est from a good german tech -
Comment 1
Thanks for the input. I'll try that, at least I'll get a qualified answer. -