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CAUTION! must use the parking brake on incline

17476 Views 20 Replies 6 Participants Last post by  RSM
So it happened twice car was in Park ! (gear) selected after few minutes car rolls back on inclined road . luckily was in car . took it to dealer and was told it states it in the owners manual car can default back to neutral So on a hill must use parking brake. what engineering marvel was this :confused:
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Idle neural is a bit more common nowadays with manufacturers trying to make fuel efficient cars. Either the CLA is equipped with this feature or the torque in the small engine isn't enough to hold the car. Either way you should never rely on the transmission alone to hold a car on an incline.

Tony, with your comment on it rolling back then stopping makes me wonder if it is also equipped with anti rollback. Was it decent size incline and can you feel the brake disengage when pressing the accelerator?

Unfortunately, all articles are still focused on reviewing the car instead of the technical details to find out.
The incline is very slight but enough to make the car move but only a little bit. The car does have anti-roll back feature.
Thanks for clarifying.
Somethings not right, I would take to the dealer and have them show you others that roll back even in P mode. I take it this is what you're reading,
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I can see how it can be taken as it will switch to N when turned off but I don't think it's the case. At least not when it's already on P mode. The part about the P-Brake is disclaimer found in all manuals for safety reasons. Kinda like always make sure to wear goggles when using power tools.
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That it's the easy way out but I would rather have it fixed if it's an issue. If you're able to duplicate, pick up a service manager and take him to your house or where you're able to duplicate.
I've taken a manager on a ride along when his techs couldn't hear a noise I heard on the same turn I took every day to work. Came back from the drive and they installed new shocks.

You can always try a different dealer as well. But don't put a bandaid on it if it's an issue. You may someday forget to engage the p brake and could hurt someone.
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