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GL Class (X166) 2013-2015 after facelift became GLS (X166)

Parking brake issue

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Old May 29, 2021 | 09:58 AM
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bollotti
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Gl 550
Parking brake issue
Had a recent fault with parking brake. I thought as pads were getting low, that this was the issue.

when i went to replace pads this morning they will not retract in service mode. I am getting the following messages;



any suggestions as to what to do next? Thanks in advance.
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Old May 29, 2021 | 10:58 AM
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Are you confident you are following the service retract procedure correctly? Steering wheel buttons need to be pushed in the right sequence and within the specified time windows. Have you ever successfully retracted the pads into replacement position?

What model year and how many miles on the vehicle?
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Old May 29, 2021 | 11:13 AM
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GL 550
100% confident doing it correctly.

Mileage is 94,000, 2015 GL550
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Old May 29, 2021 | 11:43 AM
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You need a new E brake servo motor. Literally just replaced mine.
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Old May 29, 2021 | 11:48 AM
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Originally Posted by BlownV8
You need a new E brake servo motor. Literally just replaced mine.
thanks. Was it an easy job? What is cost of parts? Thanks
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Old May 29, 2021 | 12:36 PM
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Looks like around $230 here: https://www.mercedesbenzstarparts.co...-parking-brake
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Old May 29, 2021 | 12:51 PM
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Originally Posted by chassis
T Thanks, hopefully just replace like for like
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Old May 29, 2021 | 07:37 PM
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AmazonSmile: Parking Brake Actuator Assembly, Replacement Rear Park Brake Actuator with Screw Sealing Ring 1669065401 Fit for W166 X166 GLE GLS ML: Automotive

Much cheaper sources out there. The stock MB unit wasn't very good so I can't say to go that route. There are some good tutorials on Utube and it's an easy DIY.
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