Its a common problem on the 300Es. The circuit board in the fuel relay probably has a crack around one of the pins soldered to the board. You can fix it yourself with a dab of fresh solder or you can purchase a new relay here from Phil. The relay is about the size of a pack of cigarettes and is located behind the battery in the little partitioned firewall compartment.

You will need a magnifying glass to see the fine circular crack in the solder. The crack will encircle a pin that protrudes through to the back of the circuit board. ( you need to take the cover housing off the circuit board) The crack occurs around a pin of one of the heavier sets of relay points soldered to the board.

The problem occurs when riding and engine vibration cause the heavier components of the circuit board to stress the solder holding them to the board. Fatigue cracks develop and after the engine gets hot, heat from the engine causes the metal of the circuit board to expand. The expansion opens the crack and electricity is cut off from the effected relay. Consequently the engine no longer gets fuel and stops running.

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Earl



1993 190E 2.3
2000 Toyota 4x4 Tundra