the blend door actuater is bad
An ABS fault.
A door panel on a 2004 Mercury Mountaineer is held on by several screws. Once all the screws are removed the panel can easily come off.
It didn't come with a cabin filter.
A malfunction in the air bag system has been detected
The 1999 Mercury Mountaineer either has the ( 4.0 liter Single Over Head Cam , V6 engine or the 5.0 liter V8 , which is an over head valve / pushrod design engine ) Helpfull
If the ((ABS)) Light is on then it's a good thing indicating that the Antilock brakes sensor is in good condition. I too have a 2002 mountaineer
On a 2002 Mercury Mountaineer : The " check gage " light comes on if the engine coolant temperature is too high , the engine oil pressure is too low , or the gas gauge is at or near empty
Yes, the door panel needs to come off to replace the speaker.
Depending on the age of the Mountaineer, they all come with power windows now. The driver has control of all 4 windows and can also lock them so other passengers cannot roll up or down their window.
Your engine oil could be low check it when it cools and if level is fine your oil pressure sending unit could be bad or engine in need of rebuilding
I bought a used 2003 Mountaineer in November come to find out that the AC doesn't work. I have added freon but still blows hot air. I bought a rebuilt AC compressor off Ebay and will have it installed soon.
If you are going over an uneven surface, the light may come on because one wheel is spinning faster then the others.