I hardly think that is the problem.
It runs like a rapped ape. Its pretty damn fast for a 525. The car is in very good shape mechanically and physically. Its been pampered
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1988 BMW E30 325 Super ETA
2001 Land Rover Range Rover on 33" Tires, Winch etc
1972 Mercedes 220 (restoration project)
2007 Toyota Sequoia (something should be a reliable means of transportation, right?)