Driving in Brussels is, if not an art, a most definite skill. It's not for the squemish.
Road rage is not the stuff front pages are made of; it's more subtle. Don't take it personally if you see an obsene gesture coming from the people in another car.
Traffic jams in the morning along the inner and outer ring are normal between 7:30am and 9am and between 5pm and 7 pm.
Tunnels are routinely closed on Fri/Sat night for maintenance.
Speed limits are generally not observed (esp on highways) but some roads in and out of the city have speed cameras (i.e. N8 to Ninove). Curiously enough, the position of the traffic police is broadcasted on national radio every morning.
Parking on the street is relatively safe but finding a parking space can be a headache. There are many covered (paid) parkings but don't assume they are safer than the street.
Renting a car from Midi station was convenient for me, as I had taken the train in directly from Amsterdam.... but returning the car can be tricky. Please note that the rental area is on -4 in the parking garage - a wrong turn gets you on the first floor, and there's nowhere to go from there but the exit.... stay to the extreme left and follow the signs!
HERE I SHALL GIVE YOU SOME NAMES AND TELEPHONE NUMBERS IN CASE OF EMERGENCY.......
Touring Secours tel. 233 22 11
RACB tel. 736 59 59
V.A.B. tel. 219 28 80