Is there a oil sealant I can buy to stop a small oil leak from my back gasket? on 1998 Mercedes-Benz E320

The mech said he had to take the whole transmission out costing $1,500 to fix it. i've heard of sealants you can pour into you oil tank that will stop any leaks?

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1 answer
yes there are but they will only work as a temp fix if your lucky