GT/C190/R190: 2021 GT 53 park button working half the time
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2021 GT 53 park button working half the time
Hello all hopefully someone can help, my park button wants to respond half the time sometimes even less than that causing me to open the driver door so it overrides it and goes into park. A few times i have pressed the parking button more than once seeing if it was jammed and the check engine light showed up. Left the car sitting over night wanting to take it to Mercedes in the morning and it went away but the issue still remains. Maybe a silly question but i have a tune on the car could that have anything to do with it? Regardless the car runs and shifts great. Thanks
Out Of Control!!
Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
Hook up a diagnostics tool and see if there are any error codes. One question, when P doesn't work, is there a small arrow next to P in the instrument cluster pointing at the letter P? The small arrow indicates when the transmission can be put in Park. Usually disappears above 5 mph. If the arrow doesn't show when you are stationary, then it's likely a sensor or something that doesn't recognize it is safe to put the transmission in Park.
Last edited by superswiss; Nov 27, 2024 at 01:15 AM.
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- Your park button issue may stem from:
Possible Causes
- Faulty Park Button: Could be sticking or worn. Clean or replace it.
- Shift Module Issue: Sensor or actuator problems in the shift system.
- Electrical Problem: Loose or corroded connections in the park mechanism.
- Software Glitch: Unlikely caused by the tune but consider resetting the system by disconnecting the battery.
- Manual Override: Opening the door to engage park might briefly trigger a fault.
Next Steps
- Clean and inspect the park button.
- Scan for stored fault codes with an OBD-II tool.
- If unresolved, consult a Mercedes specialist.
Thread Starter
Newbie
Joined: Nov 2024
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Hook up a diagnostics tool and see if there are any error codes. One question, when P doesn't work, is there a small arrow next to P in the instrument cluster pointing at the letter P? The small arrow indicates when the transmission can be put in Park. Usually disappears above 5 mph. If the arrow doesn't show when you are stationary, then it's likely a sensor or something that doesn't recognize it is safe to put the transmission in Park.
Out Of Control!!
Joined: Nov 2018
Posts: 11,432
Likes: 5,342
From: San Francisco Bay Area
2019 C63CS
Next step is reading out the error codes to see why the CEL is on. Sounds like there's an underlying issue. If you don't have a code reader, stop by an Autozone or similar. They can read the codes.
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Out Of Control!!
Joined: Nov 2018
Posts: 11,432
Likes: 5,342
From: San Francisco Bay Area
2019 C63CS
Time to take it to a dealership or an independent Mercedes shop with the right tools. There's the possibility that the codes are manufacturer specific codes, which depending on what scanner was used may not come up.
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