My sis-in-law has a 1997 W210 E420. Recently, the cabin fan began acting up. The A/C blows cold air, however, the fan only blows at the lowest speed. In auto mode, the display indicates that the fan should go higher, but it doesn't. In manual mode, same thing, the fan stays at the lowest speed.

Any ideas?

Thanks!

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Glen Tokuhara
Beauty & the Beast and the wagon that could!