Scotty, if you have Esp the TCS button says Esp instead.
As for ESP itself, im still unsure about it. I ordered it on mine for two reasons.
1. I managed to spin my car 180 in a country lane a year ago and felt that maybe im not as great as i thought i was
2. THe LCR had it as standard.
Now then, When i first got the car, the way i was driving i didn't even get the light to flash once and therefor if you are a pretty safe driver then it would be handy to have just in case it was seriusly needed. Now that i have been driving the Cupra for a while it comes into effect on a daily basis. I believe its already stopped me once making a fool out of myself.
The biggest
problem with it is pulling out. When you try to get out of a side road quick the esp/TCS kicks in and cuts power to the engine making it slightly imbarrassing sometimes. Now when i need to do that i turn it off for that and turn it back on again.
Also Ive heard that if you turn off the ESP and you have a crash the insurance will not pay out. Could possibly be the same with TCS.
I still unsure about it but unless it saves you life you wont ever be able to justify it.