[Torekk]

Well, thanks for your help at first. But how would I then "include" into this command?

pawn Code:

if (strcmp("/fix", cmdtext, true)==0)
{
     if((!IsPlayerInAnyVehicle(playerid)) && (GetPlayerState(playerid) != PLAYER_STATE_DRIVER))
     {
          SendClientMessage(playerid, COLOR_RED, "You are not in a vehicle or you're not the driver of it!");
     } else {
          SetVehicleHealth(GetPlayerVehicleID(playerid), 1000);
          PlayerPlaySound(playerid, 1133, 0.0, 0.0, 0.0);
     }
     return 1;
}

Edit: That command works, but when you enter as a passenger, you can still repair the vehicle, so I guess that PLAYER_STATE_DRIVER is either not available or wrong.

Edit2: It appears that you can't use GetPlayerState(playerid) != PLAYER_STATE_DRIVER, you'll have to make it "vice versa".