I don't think so.
I have a 1998 Mercury Mystique LS automatic w/ a 2.5 liter V6 and it takes Mercon V transmission fluid. I'm not certain if it is the same for you, you should probably consult your owners manual.
were is the iac locate on a 1999 mercury mystique
According to the 1998 Mercury Mystique Owner Guide : ( 61.5 litres / 16.2 U.S. gallons )
Motorcraft MERCON automatic transmission fluid for the automatic and 5 speed manual transaxles according to the owners manual
yes
No , coil pack
That should be OBD 2
Replacing ERG Valves in a 1998 Mercury Mystique is fairly hard because it requires great precision to avoid blocking the EGR passage.
A 1998 Mercury Mystique with the 4-cylinder 2.0 DOHC appears to have a non-interference engine. Therefore, if the timing belt breaks, there should be no damage to the valves/pistons.
Dealer or salvage yard.
98 mystique has only one cat conveter
There could be several reasons why a 1998 Mercury Mystique is overheating. The radiator may have a leak, the thermostat may be stuck, or the head gaskets could be blown.