Thanks to all who suggested this as the major culprit to the ETS warning light issue I was facing. Spent about 45 minutes in the dark last night (well, with a flash light) replacing the switch. Hardest part was getting the under dash panel out. Did the lock-to-lock steering wheel move and the problem is fixed! $18.49 for the switch. Not bad.

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KyGuy
'04 E500 Brilliant Silver/Ash (50K)
'01 ML320 Desert Silver/Parchment (67K)
'99 C230 Kompressor Black/Black (62K)
'93 Mitsubishi Montero (134K)(Home Depot Express)


'70 6.3 Gold/Tobacco (128K) (sold and now in Germany)
'94 E420 Silver/Blue (80K) - Sold
'97 E320 PearlBlack/Parchment (77K) - Sold
'66 300SE Coupe (owned 2002-2003)