Hi Pentop63
1. All G20 grills open only when the engine needs air, it closed most of time
2. Coasting manually, I have done this, yiu just need to push the gear lever forward without pressing the side button. This puts the car in neutral and allows you to coast, not sure why you would need it though
I use it in dense traffic
3. Sorry., I don't have the answer to that one
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