Part 415191 Connection Tail Membrane

We are having the exact same problem with this part! Our oven is a S301T, but it still has the same part number for the tail membrane (touch control).

In FINALLY contacting someone at Thermador we were able to find the following information which might aid you. The part is manufactured by Bosch and according to Appliance Pros.com, the numbers:
Part Number 415191 Manufacturer's number (Bosch) Part number AP2832583 which replaces the part number originally numbered 14-38-680.

Don't know if this will help....it hasn't helped me so far. Thermador suggested that we go to a site named OBSOLETEAPPLIANCEPARTS.com. This site seems to be really messed up because you have to call and leave a message as the site is under construction!

I'm so darn frustrated that I'll never buy a Thermador product again (even thought they are great when they work) Good luck!!