Nothing; have just had the car for three weeks.
This is yet ANOTHER Grand Marquis.. my 5th. Another Mercury in my carport. Saw what is out there, and for 1/3 less bought another Grand Marquis.
This one had been sitting on a lot for one year after service as a rental. This one is an Ultimate with 17" inch wheels; that is really all the changes. Put on a factory dual exhaust and transferred the K&N air filter.
Would you buy another car from this manufacturer? Don't Know
Review Date: 13th November, 2011