How to Adjust Headlights on a Mercury Grand Marquis?

Answer Proper headlight adjustment is essential for safe night driving. If your Grand Marquis' headlights are out of alignment, you will notice a dramatic reduction in nighttime visibility. This, in turn,... Read More »

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How to Adjust the Headlights on a 98 Ford Mercury Grand Marquis?

The 1998 Mercury Grand Marquis features headlights with adjustment screws from the low and high beams. These adjustment screws are readily visible on the rear of the headlight body. For this reason... Read More »

How to Adjust the Windshield Wipers on a Mercury Grand Marquis?

If the windshield wipers on your Mercury Grand Marquis are not doing their job properly, it becomes not only a question of aesthetics but a safety issue. Sometimes the windshield wipers can get mis... Read More »

How to Adjust the Idle Speed on a 1981 Mercury Grand Marquis?

The idle speed in a 1981 Mercury Grand Marquis is the rate of engine RPMs when the throttle is at rest. If the idle speed is set to low, the Grand Marquis's engine can stumble and stall. If the id... Read More »

What is the difference between a Mercury Grand Marquis GS& LS?

Prior to 2009, the Mercury Grand Marquis was available in two trim levels: the base model GS and the higher-end LS. Both had the same engine, transmission and chassis.SeatsThe GS had cloth seats wi... Read More »