Here are a few situations when you might want traction control OFF. When starting from a stop in snowy conditions, all your wheels can easily slip. When this happens, the TCS can intervene, keeping you from moving. Disabling the system lets your wheels move enough to get forward traction. Also, if you get stuck in deep mud or snow, you'll want to turn off the system in order to let the wheels spin and generate some grip. This will allow you to rock the car back and forth between drive and reverse repeatedly. If you're successful, you'll be able to build enough momentum to free your vehicle. Also, turn off TCS when using tire chains on icy and snowy roads. A certain amount of wheel slip is normal under these conditions, and the constant intervention of traction control may be an unwelcome distraction.