It won't, but neither will the 12v gauge. I carry a survival kit in the car, as I'm sure most do, which includes spare fuses, bulbs, hoses, a belt, and an extra voltage regulator, etc. These are just a few basic things that can help if you run into problems while on the road. Of course, none of these items would do you any good when faced with catastrophic failure of a fan bearing bracket, a severed ball joint, or a disintegrated flex disk. Either way, the only real assurance is the roadside assistance.

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1990 190E 3.0L