I HAD THE SAME EXACT ISSUE WITH MY DAKOTA IF YOU LOOK INSIDE THE ENGINE AND FOLLOW THE SPARK PLUGS CABLES YOU WILL SEE THERES AN EXTRA ONE THAT LEADS TO A SEPARATE WAY AND GOES INTO A SMALL BOX WHEN IT HEATS UP IT WILL SHUT OFF YOUR CAR AND THEN AS IT COOLS DOWN YOUR ENGINE WILL START AGAIN
YOU CAN FIND THESE LITTLE BOX WITH A SPARK PLUG AT AUTO ZON OR ANY AUTO PARTS
AND THE COST FOR NEW IS $35.00 USED CAN COST ABOUT $20
LOOKS LIKE THIS BUT WITH A SPARK PLUG TIP ON IT
http://www.benzworld.org/forums/attachments/w140-s-class/185202-94-99-s320-tune-up-instructions-coil.jpg
GOOD LUCK
