The guy at the MB dealership told me the keys come directly from Stutgart. And though you can find a replacement key, remember the tumbler is worn as well.

When our keys decided they didn't want to auto-roll the windows up from the door tumbler followed by not wanting to start the ignition we opted for a set of newbies and an ignition tumbler, all was around 120.00 from MB. And as an added bonus the express up/down window feature started to work in both the driver and passeger doors again.

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93 300 D 2.5 turbo