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This could be an automatic response from the computer putting the car into what's called "limp-home" mode so you don't blow the engine or tranny because there's something wrong. MB does think of a lot more than other cars. Time to take it to someone (like a dealer) who has the computer diagnostic hookup. The "limp-home" mode should be described in your owner's manual.

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15y ago

What else can I help you with?