2000 523 Auto - Stall or running rough when WARM

My 523 occasionally stalls immediately after starting, or runs with reduced power and threatens to stall when stationary. But this only
happens if the engine is started when it is warm. If the engine is cold it starts and runs fine. Any ideas before I donate loads of cash to my local BMW delaer?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.