Bob,

If the car is sending a message, then there is a code present.

The W211 requires the SDS system to access the codes. Amazing amount of info out there via the SDS system. I'm still amazed at how much it can tell me about my W211.

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles