I took my car to the dealer for an oil leak. They told me it was an engine mount on 2005 BMW 745Li

To be exact it is the drivers side engine mount seal. How difficult is this repair? The dealer wants $700 and the part cost $15. Is there a site to print a schematic so I can make sure I have the necessary tools prior to attempting the work? I just paid them $7000 for a head job on a car with 67,000 miles so I am reluctant to give them more money.

Asked by for the 2005 BMW 745Li
Ever thought about another make of car? These are sharp rides i will give them that but hi dollar to work on.
67k for other makes ain't broke in yet! Maybe an Asian even American mod. would be better. just saying.
I agree with answer 1 I think (hope) you misunderstood what they told you about the fix.
2 more answers
I am no expert but I have never heard of an engine mount seal
Engine mounts have NO SEALS...Maybe you misunderstood what they said...possibly another "oil seal"?