Car won't restart hot

What is your question?

Check engine light is on, its o2 sensor, car will not restart when the engine is hot, it try's but it's so rough it just stops after a little while, after it has cooled down it restarts in the first try no problems.

What makes this problem better or worse?

When I have driven for a few minutes

How long has your 2007 Mercedes-Benz R350 had this problem?

A few weeks