Quote:
Originally Posted by faarcanal
What is the difference between IAS on f10 and AS on e60?
Does IAS also use the electric motor driven speed dependent variable ratio gear steering?
The dealer confused me with his description of IAS as std steering with the addition of back wheels turning to aide steering.
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I have never tried AS on an E60, but IAS on the F10 sounds like essentially the same thing. Speed dependent variable ratio steering with the addition of 4-wheel steering. Whether you have IAS or not, I believe the steering is via an electric steering motor regardless in the F10.
My 535i includes the IAS and I really like it. But it isn't for everyone.
IAS Pros:
- Lowers the amount you have to move the steering wheel to turn the car at all speeds.
- Better handling in the twisties from the 4-wheel steering
- Smaller turning radius at low speeds
IAS Negatives:
- Extra complexity, something more to go wrong.
- "Boosts" the steering more. Maybe a little less feel than non-IAS cars.
- Makes alignment more expensive and tricky.