Join Date: Feb 2008
Location: Yukon, OK
Vehicle: '07 SLK 280; '04 C 320, '01 Honda S 2000, '98 Ford Ranger truck.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanked 114 Times in 83 Posts
Ye, and I sensed some questioning in the OP as to whether the ESP had failed, or if something else were wrong. I suggested a simple test to see if ESP has failed, and that was (and is) to check the operation of the cruise control. If it does not work, it's pretty certain that ESP has failed and, in turn, it's pretty certain that a sensor has failed.
Intermittent failure of the top to open is most likely (to my experience) failure of the switch on the right side of the trunk (boot) protector shade (that is supposed to activate when the shade is pulled out). This sensor switch tells the top mechanism that the shade is pulled out, which is necessary to put the top down. If this sensor switch is dirty or faulty, it will send a message that the shade is not pulled out, and won't let the top open. This switch is located in the rail into which the right side of the shade bar hooks when the shade is pulled. I fixed one by spraying WD 40 into it. But sometimes they need replacement.