Mercedes Blower Regulator Up for sales is a good used Mercedes W126 blower speed regulator / resistor. Mercedes part# 126 820 53 10 (1268205310) / 1147328073 / 90.943.01.075. Will work on ALL W126 chassis from 1986 - 1991

The typical failure on these is causes the loss of one or more of the climate control fan speeds (it may still operate on full or low speed), or total loss of fan function. These can also cause blown fuses. If your fan makes no abnormal noises, and works sometimes but not all the time this is usually the cause. Some common models these fit are the 300SE 300SEL 420SE 420SEL 560SE 560SEL 300SDL 300SD 350SD 350SDL List price at MBUSA is nearly $700! get this one for less than you would pay in tax at the dealer! I only sell the OEM units, never aftermarket so they are the same quality as your original. Thanks for looking!