Hello all very new here thanks in advance for your patience. I have a 2006 m9540 that I have replaced the fuel pump on. I went with an after-market pump that cost around $30 as opposed to the $220 OEM Pump. The pump works however the cardboard gasket provided does not seal properly and leaks oil. Any suggestions? I'm tempted to buy the OEM pump but I'm not 100% sure that would fix the problem. thanks,