Go to an Interstate battery dealer. They make a battery for your car. The replacement battery does not have a vent hole. On my car the vent hole was in the floor and a tube from the OE battery went thru the hole. If you find a Interstate battery distributor you will get the battery cheaper. My battery is a Interstate Megatron Plus MTP-92 850 CCA.

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1998 E300Turbodiesel
1980 300d

Ready- Ronnie