karachi me chill hai yaar ... lemme tell u best thing u can do is as said by sum user of pw lower down ur windscreen ...
or use contact or 50 rupees ...
Else make a doctor certificate tht jiske nam pe gari hai he has skin problem ... or ask some higher level of sectrary to make a vvip protocol ...
what i have till now a minister of govt can sign a paper in which he will rite numberr of ur car n his own mobile number ... when police stops u show him the ministers note pad written letter which has stamp on it in this way police will not touch u co he will know app pawa paryty ho sectry janunay wala hai appka ... or keep a card of some higher post ssp or dig ... n ask him tht sometime the p9olice official ask to give him ur car n thts why he has tinted the car ...