328xi - Automatic gear transition is not smooth when driving slowly
I just recently got my first BMW (328xi, Auto 6 Spd, Brand new) and have the following questions..
1) When I drive slowly in traffic (0 to 40Km/h), automatic gear transition is not happening smoothly; I could almost feel the impact while driving; However this is not happening when driving above 60Km/h. Is this a known 'behavior' with 328 Automatic? or anyone experiencing this?
2) what are the short/long term impact should I expect if I change the fuel from Supreme (Octane level 92) to Extra (Octane level 89)? Is changing the fuel to regular and/or extra?
3) Any tips for winter maintenance (eg. alloy wheel protection, exterior cleaning, underneath coating)
Thank you in advance.