White smoke would suggest water.

Maybe you have a coolant leak from a heater hose or something, that is dripping on the engine or the exhaust manifold, thus the white smoke.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".