One problem related to speed control cable has been reported for the 2003 Mercury Mountaineer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mercury Mountaineer based on all problems reported for the 2003 Mountaineer.
Driving on highway and tried to stop for red light. Cruise control had been on but when brakes were pressed vehicle was not slowing down. As I got closer to the stopped cars I put transmission into neutral and rpms went way up. I pulled over and shut off. Had car towed and repaired. It happened again on interstate next day. Brought to Ford dealer and told it was cruise control cable. This is a very dangerous situation.