1998 was the first year of the DAS system and 3 button keys for 140s. If the drive auth system ecu has died, there may be no way to start it. Sometimes d&c of the battery can get the car to start again. Just replaced one of these on a 99 SLK and there was no work around on that car.

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Dr.Diesel -
Shop Foreman
Master Guild Mercedes-Benz Technician.

Think the dealer is expensive? Do you know how much it costs to train a dealer tech? Or buy the required MB special tools to have on hand?