what do the symbols on a renault scenic dashboard mean

Any particular ones you are after?

The diamond in the middle of the steering wheel means that it is a Renault.

Can you be more specific?

well you will have to tell us what ones.some mean engine others mean lights, some mean its going to blow up nowing a renault!!!!!!!!!!!

Whomever sold u the car should've given u the manual too. It is really tough to say like this. Also, the symbols depend on whether u have a diesel engine in there or a petrol one. You might want to be more specific about the symbol, though. l have a Megane, it has exactly the same dashboard, but there r loads of symbols to account for.
However, l am not leaving u in the dark. You should watch out if the following symbols light up: SERV stays lit after u started the engine - means something is wrong with the engine & u should take it to the service. STOP stays lit after u turn on the engine - problem with something, go to the service. ABS - lit after u start the engine or lights when u drive - ABS system failure, u have normal brakes now but u should get it repaired. The ((!)) sign (also lit when u pull the parking brake) lit when u drive & u know u put the parking brake down - u have serious problems with ur braking system - brakes work at 20% efficiency - very serious, go to the service immediately. The gas pump lamp - little gas left in the tank - go to the gas station & get some fuel (you have fuel for 40Km however).
Those r the critical ones. Mail me for other symbols, though my advice is that u get the manual.