You can drive yourself in Malaysia, but don't forget that they drive at the left side of the road (especially if you are from Europe or the United States).
But in Kuala Lumpur (KL) you can better use the subway since it's very crowded on the road.
There is a GPS navigation map of Jakarat but it isn't accurate. It's more a nice to have gadget.
Internet is very helpful to prepare your trip to Malaysia.
MyAsiaChannel has collected the best websites which answers all these questions. So you can find everything quick and easy.... A good start of your trip!
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