I do slow lane changes on the open highway...I save the abrupt ones for heavy traffic...

And my wife is also annoyed at abrupt steering changes of ANY sort!

I don't think slow lane changes make you look like an idiot...it's the not turning off the turn signal afterwards that does!

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car