240DL - Smoke when turning...

For smoke to appear so quickly, it must be caused by friction. Since you're turning the corner harder than usual, it supports this conclusion. My main guess is the clutch plate could be giving off smoke from slipping - you're going around the corner harder than normal, car can only give so much acceleration before something has to give. You can test it by *making* the clutch slip and see if it's the same smell. Also keep in mind the half-moon seal in the back of the engine... When it leaks, oil makes its way between the engine and gearbox. When you turn the corner hard, this oil might be "tilting" enough to touch just a little on the clutch plate. Again - friction & oil - produces smoke.

Could also be (but not as likely), the rubber mount/bearing the drive shaft slots through.

Allan.

It might also be one of the wheels rubbing in the front. Imagine if one of the suspension parts is shot - drives fine until you pur sideways stress, then the wheel goes a bit too far - smoke all under the car.

What does the smoke smell like ? Follow the smell and you will find the problem. If your mechanic has seen the smoke but couldn't figure out where is was coming from then I would be looking for a new mechanic. Oil, trans fluid, rubber, clutch and coolant all smell very different. It maybe that fluid is finding its way onto your exhaust and burning off.

AJS