New symbol on dashboard

faulty tire sensor is your tire pressure sensor --not tied to abs or 4wd --have vehicle scanned for trouble codes

Fix your car right away, by clicking the link
Mercury Mariner 2005 2007 Factory Service SHop repair manual download

Resetting check engine light after changing fuel filter on 2005 mercury...

The Yellow Wrench is what ford calls a MIL Lamp

That technology shouldn't be new to you or what you
do next

OBD2 Systems have been on all vehicles since 1996

All veh are the same

Any dash light you check for codes with a day or so,if
you want to know what the issues might be, then google the codes

I would just go to a repair shop immediately at any check light
being on.

You shurely know that a dealer is Never needed to work on any
vehcile & you also should know they charge more,a good reason
not to be there even with a new a car unless you there for free
warranttee work only

Yes you will pay $100 every time the dash light comes on
These shop have big investment in test equip

Finding the issuse if sometimes the entire job,the fix is not
always a big deal

Very bad advice for a dealer to tell you to continue to drive
a vehicle when they have no idea what is wrong.

You need those codes day one to determine if you should use it

Buy yourself a $60 code reader & google the codes on any
& all your vehicles so you can decide if you should be using it
at all.

there is a reverse switch that semds the voltage to the back up lights,, yours is either stuck, or bad.

look for the spark plug wire the plugs are bolted into the engine block you have to pull wire of spark plug first 5/8 deep socket should do the job good luck

What your telling us is---that you don't own metric
wrenches or not enough and you have no Torx
Driver Bits.

Need almost all metric tools to work on any
vehicle from 1980 on

The vehicle is equipped with a security system. The light means it is armed.

you have to take it to the dealer to get it scanned for the code.

two screws on the inside and lightly tug the the assembley off the outside of the car. should pop right off.