A/c
What is problem? A/c switch works well on high but not on any other setting.

Mercury’s Grand Marquis, essentially unchanged since the last millennium, soldiers on, at least through 2011. This grandfatherly six-passenger full-size sedan long ago saw its halcyon days, yet remains – for the moment – a staple in the livery and taxi realms. Its roomy cabin, capacious trunk (nearly 21 cubic feet), staid, if not quite supple, ride, and placid demeanor relegate it to picking up passengers at airports and hotels, or the occasional trip to corporate headquarters if the Town Car is in the shop. Rumored to be phased out in 2012, this venerable tank is still available only in a rear-wheel drive (RWD) configuration, still carries a now-underachieving V8 powerplant, and remains mired in the four-speed-automatic past. Only Chevy’s V6-powered Impala can claim a similarly anachronistic image, yet it boasts nearly the same horsepower as and better mileage figures than the Grand Marquis. Additionally, Chrysler’s 300, Toyota’s Avalon, Hyundai’s Genesis, and Ford’s Taurus sedans are worth a look before deciding on the MGM.
The 2011 Grand Marquis continues to be powered by a 4.6-liter Flex Fuel V8 managed by a graybeard four-speed automatic transmission. Apparently, the capability to burn E85 ethanol fuel is Mercury’s only cession to upgrading this weary powerplant. In any case, all those cylinders put out only 224 hp, while a respectable 275 lb-ft of torque mean that it’ll pull 1,500 pounds of trailer, should the spacious trunk prove inadequate to hold all the souvenirs from a world cruise. EPA-estimated mileage figures are a dismal 16/24 mpg, though claims have been made that horse-and-buggy speeds on the highway will marginally increase fuel efficiency.
Appearance amenities and creature comforts in the 2011 Grand Marquis, while not quite so numerous as in its Town Car stablemate, are up to the task of ferrying passengers to and from cruise terminals, train stations, and airports. Such standard features as a self-leveling suspension with ride-control adjustment and 17-inch painted alloy wheels complement cabin amenities like leather upholstery, power-adjustable front bench seats, digital keypad door locks, power windows and heated outside mirrors, steering-wheel-mounted audio and cruise controls, overhead console, tilt-adjustable steering wheel, dual-zone climate control, simulated wood and genuine leather cabin and dash trim accents, and a single-CD player with four speakers. Options are severely limited, with only 17-inch aluminum wheels, leather and Burl wood steering wheel, heated seats, and a cassette deck available.
The 2011 Grand Marquis is a large, heavy vehicle, thus its safety scores remain solid. Additionally, four-wheel disc ABS, traction control, dual front side-mounted airbags with head protection chambers, front fog/driving lights, cornering headlights, and a post-collision safety system further contribute to passenger safety and security.
Among owner gripes concerning the 2010 Grand Marquis, cupholder placement seems to outrank anemic power and dated styling, though both those others remain high on the list of complaints. Poor mileage figures, a lack of options packages, illogical placement of many controls and buttons, and the difficulty in finding battleship-size parking spots also contribute to owner discontent. On the positive side, however, cabin space, luggage capacity, decent safety scores, and a quiet, stately ride are notable advantages for owners of this vintage automobile.
What is problem? A/c switch works well on high but not on any other setting.
Mercury Grand Marquis 2011, with 140k km mileage. Few months back it has lost a huge amount of power suddenly and with no previous problems. across all gears (Engine weakness) tried to diagnose the reason but couldn't find it. About a week ago an engine light came on. I was happy. The code is a misfire code. The car misfires for about 2-3 seconds then goes back to normal only during idle. And not always, it happens randomly and only during idle. Usually during a cold start. The misfire is not on one cylinder. Each time it happens in a different cylinder. Tried to change the spark plugs, changed 3 ignition coils, good fuel pump, good fuel filter, good air filter, cleaned intake manifold and cleaned MAF sensor. The problem is still there and a misfire happend at cylinder 3 where the new ignition coil is. So problem is not the coils. Drove the car up to 150km/h and it could still go for more. So I'm guessing it is not fuel related. Also the startup is smooth and healthy. If possible, give the probable cause of this. Thank you and have a great day.
When does the new Grand Marquis come out?
Air Conditioning
Automatic climate control front air conditioning · Single front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags
Audio System
Antenna Type: element · 6 disc in-dash CD · AM/FM radio · Total Number of Speakers: 4
Brakes
ABS: 4-wheel · Front brake diameter: 12.0 · Front brakes: ventilated disc · Rear brake diameter: 11.6 · Rear brakes: ventilated disc
Comfort Features
Armrests: front center · Dash trim: wood · Door trim: leather · Floor Mat Material: carpet · Floor Material: carpet · Floor Mats: front · Steering wheel trim: leather
Convenience Features
Ashtray: with lighter · Cupholders: front · Dimming rearview mirror: auto-dimming · Keyless entry: keypad · Multi-function remote: keyless entry · One-touch windows: 1 · Power outlet(s): 12V front · Power steering: speed-proportional · Reading lights: front · Steering wheel: tilt-adjustable · Steering wheel mounted controls: cruise controls · Storage: front seatback · Vanity mirrors: dual illuminating
Driver Seat
Adjustable lumbar support: power · Power adjustments: 8
Drivetrain
Axle ratio: 2.73
Exterior Features
Body side moldings: body-color · Door handle color: chrome · Front bumper color: body-color · Grille color: chrome · Mirror color: body-color · Rear bumper color: body-color
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 2
Instrumentation
Fuel economy display: MPG · Warnings and reminders: low fuel level
Lights
Daytime running lights: fleet · Exterior entry lights: security approach lamps · Headlights: Auto on
Mirrors
Exterior mirrors: heated
Passenger Seat
Adjustable lumbar support: power · Power adjustments: 8
Rear Seats
Type: bench
Safety
Child seat anchors: LATCH system
Seatbelts
Front center seatbelt: lap belt · Rear center seatbelt: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front
Seats
Driver seat power adjustments: height · Front seat type: split-bench · Passenger seat power adjustments: height · Upholstery: leather
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim Type: steel
Suspension
Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: strut · Rear Shock Type: gas shock absorbers · Rear Spring Type: coil springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-link · Stabilizer bar(s): front
Tires
Type: all season
Tires and Rims
Wheels: painted aluminum
Wheels
Wheel spokes: 18
Windows
Front wipers: variable intermittent
Air Conditioning
Automatic climate control front air conditioning · Single front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags
Audio System
Antenna Type: element · Single disc in-Dash CD · AM/FM radio · Total Number of Speakers: 4
Brakes
ABS: 4-wheel · Front brake diameter: 12.0 · Front brakes: ventilated disc · Rear brake diameter: 11.6 · Rear brakes: ventilated disc
Comfort Features
Armrests: front center · Dash trim: wood · Door trim: wood · Floor Mat Material: carpet · Floor Material: carpet · Floor Mats: front · Steering wheel trim: leather and wood
Convenience Features
Adjustable pedals: power · Ashtray: with lighter · Cupholders: rear · Dimming rearview mirror: auto-dimming · Keyless entry: keypad · Multi-function remote: trunk release · One-touch windows: 1 · Power outlet(s): 12V front · Power steering: speed-proportional · Reading lights: rear · Steering wheel: tilt-adjustable · Steering wheel mounted controls: cruise controls · Storage: front seatback · Vanity mirrors: dual illuminating
Driver Seat
Adjustable lumbar support: power · Power adjustments: 8
Drivetrain
Axle ratio: 2.73
Exterior Features
Body side moldings: body-color · Door handle color: chrome · Front bumper color: body-color · Grille color: chrome · Mirror color: body-color · Rear bumper color: body-color
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 2
Instrumentation
Fuel economy display: MPG · Warnings and reminders: low fuel level
Lights
Daytime running lights: fleet · Exterior entry lights: security approach lamps · Headlights: auto delay off
Mirrors
Exterior mirrors: heated
Passenger Seat
Adjustable lumbar support: power · Power adjustments: 8
Rear Seats
Type: bench
Safety
Child seat anchors: LATCH system
Seatbelts
Front center seatbelt: lap belt · Rear center seatbelt: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front
Seats
Driver seat power adjustments: reclining · Front seat type: split-bench · Heated: front seats · Passenger seat power adjustments: reclining · Upholstery: leather
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim Type: steel
Suspension
Air Suspension: rear · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: double wishbones · Leveling: self leveling suspension · Rear Shock Type: gas shock absorbers · Rear Spring Type: pneumatic springs · Rear Suspension Classification: solid live axle · Rear Suspension Type: multi-link · Stabilizer bar(s): front
Tires
Type: all season
Tires and Rims
Wheels: chrome
Wheels
Wheel spokes: 18
Windows
Front wipers: variable intermittent