HI i have just recently purhcased an 1993 405 GE petrol and being a female have no clue about the coolant levels as on my other cars there has always been an MIn and Max level light plastic so you can see the water levels, but on the 405 its black plastic casing at front of engine ( hope this is the right) but i can not see any min max levels so how do know if levels are ok? also my petrol gauge when i first start the car are wrong it shows half a tank but there is only a tenners worth in it after driving for 5 10 mins it drops down to the quarter mark, should i be worried? feedback greatly welcomed.