Until the A4 gets ESP (Electronic Stability Program) this won't be an issue, but I was wondering if the BMW's Corner Braking Control will prevent under and oversteering and spinning than the Quattro?<p>Since the Quattro only works with the gas pedal down, how can it help when you are entering into a turn and understeer? Or slowing down into a turn and oversteer?<p>Would the ESP significantly enhance the A4?<p>Dave

Kevin has the best answer. But really, ESP is a marketing issue. Take your sport q with good tires and try to get it out of control. It is almost impossible. It is VERY tolerant of bad and good driving.<p>Yes, on ice or bad gravel (ordriving abusively in the dry) you can make it understeer by jamming on the brakes in the corner and oversteer with excessive trail braking. Drive with any degree of skill and the car is completely unflappable.

That's my first true experience of Mercedes ESP system on FR car on a very lousy snow, salt and sand city streets. The ESP system helps the car minimizes the understeer and oversteer when you crazily pressed the car into corner on the wet weather corner. It benefits for the RWD vehicles especially if they are high-powered, as with the AMG C43. Sure the system helps the vehicle to skid less on the corner, but nothing compares to Audi's Quattro system in such a lousy weather. Quattro can enables your confidence (not OVER-confidence) when you press into corner even in lousy weather if you have a proper sets of tires. Off and on throttle understeer are easily saved by the throttle control. What about ESP combines with Quattro/ESP? Unbeatable package, indeed.<br>Tom<br>97 A4 1.8tQMS<br>99 JETTA GLS 2.0<ul><li><a href="http://vancouver.a4.org">A4 Club of Vancouver</a></li></ul>

I can't say I ever drove a 911, or say the least turn one around a corner at high speeds. How is it "exciting"?<p>And how does engine braking with Quattro handle the car better than regular braking (which also gradually slows down all four wheels)?