K 38 relay on a 98-99 is under the hood in relay box behind fuses.you'll see two modules then a row of relay starting from engine pink,black,little blue and pink.Pink one next to little blue is what you want to change,you can swap with top one if you are not using the AC.Car will start

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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