Drive modes and exhaust sound

[Robbierob]

Hello, found this on another page:

1: TOUR

• Engine maximum rev limit: normal
• Throttle progression: normal
• Exhaust valve behaviour at idle and when driving: closed at idle, opens at high throttle load or above 4000rpm
• Launch control (auto and DCT only): not available
• DPM characteristics: Understeer Recognition on, managed Slip Threshold

2. SPORT

• Engine maximum rev limit: +200rpm
• Throttle progression: increased
• Exhaust valve behaviour at idle and when driving: open at idle (yay!), opens from low throttle load/rpm and is fully open above 3000rpm
• Launch control (auto and DCT only): available
• DPM characteristics: Understeer Recognition reduced, increased Slip Threshold and increased yaw angle available

3. TRACK (for cars with Drivers Pack, including First Edition)

• Engine maximum rev limit: +200rpm
• Throttle progression: optimum
• Exhaust valve behaviour at idle and when driving: open at idle +200rpm, opens from low throttle load/rpm and is fully open above 3000rpm
• Launch control (auto and DCT only): available
• DPM characteristics: Understeer Recognition off, ESP intervention level increased to high, traction control system calculates available grip and optimises torque to maintain grip and minimise understeer

4. OFF

• Engine maximum rev limit: +200rpm
• Throttle progression: optimum
• Exhaust valve behaviour at idle and when driving: open at idle +200rpm, opens from low throttle load/rpm and is fully open above 3000rpm
• Launch control (auto and DCT only): available
• DPM characteristics: traction control and ESP completely switched off

Can somebody confirm this and what means 4. OFF?

Thanks Robert