with my w126 diesel, it was the socket, where pin's connect, that was the problem. as it aged you needed to push pins deeper, by a block of wood under the female plug. best fix would be do away with socket, or some how gold coat pin's and sockets.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt