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When I push the park P button, it goes to netural N first then park P very fast but still take time. Today, I pushed the parking and quickly turn off the engine, the gear was still on netural N! I didn't know and let the brake go and noticed the car is sliding down from the parking lot.Luckily nothing is behind me, but very scary and stupid design!
Last edited by majiayaa; Sep 23, 2024 at 09:59 PM.
Something's not right. Turning off the engine should automatically engage the parking brake. You don't even have to press P. You can just turn off the engine and then the transmission automatically goes into P and the parking brake automatically engages. I've never experienced what you are describing in any modern Mercedes. The moment I turn off the engine, the parking brake engages. Yes, that takes a moment, so if I let go off the brakes too quickly the car can move backwards or forwards a tiny amount until the parking brake and/or the parking pawl in the transmission catches it. If you end up sliding down from your parking spot, there's something wrong with your car.
Something's not right. Turning off the engine should automatically engage the parking brake. You don't even have to press P. You can just turn off the engine and then the transmission automatically goes into P and the parking brake automatically engages. I've never experienced what you are describing in any modern Mercedes. The moment I turn off the engine, the parking brake engages. Yes, that takes a moment, so if I let go off the brakes too quickly the car can move backwards or forwards a tiny amount until the parking brake and/or the parking pawl in the transmission catches it. If you end up sliding down from your parking spot, there's something wrong with your car.
checked the manual, the P auto engaged only if your gear at D or R, but not if on N, as it is designed for towing, but the issue is if you press P, it goes to N first and then P, which cause the issue if you switch off engine while the gear was still on N. I tried it on my car, it takes about 2 seconds.
checked the manual, the P auto engaged only if your gear at D or R, but not if on N, as it is designed for towing, but the issue is if you press P, it goes to N first and then P, which cause the issue if you switch off engine while the gear was still on N. I tried it on my car, it takes about 2 seconds.
I guess in that case you will need to have a habit of putting the parking brake on first to prevent roll-away and then putting it in park. It does seems strange that the vehicle when to Neutral then Park, it is supposed to go straight to Park.
By the way, when you not engage any gear and simply turn off the engine (as mentioned above) it will put the parking brake on but put the vehicle in neutral (some models), since the parking brake is on, when you open the driver door, the car will be put in Park automatically. The latter of which is what I seen for many MB models.
Something's not right. Turning off the engine should automatically engage the parking brake. You don't even have to press P. You can just turn off the engine and then the transmission automatically goes into P and the parking brake automatically engages. I've never experienced what you are describing in any modern Mercedes. The moment I turn off the engine, the parking brake engages. Yes, that takes a moment, so if I let go off the brakes too quickly the car can move backwards or forwards a tiny amount until the parking brake and/or the parking pawl in the transmission catches it. If you end up sliding down from your parking spot, there's something wrong with your car.
P parking pawl in the transmission is not the same as parking brake engagement. Unsafe condition if P is not engaged when engine is turned off at nearly the same time as P is chosen.
checked the manual, the P auto engaged only if your gear at D or R, but not if on N, as it is designed for towing, but the issue is if you press P, it goes to N first and then P, which cause the issue if you switch off engine while the gear was still on N. I tried it on my car, it takes about 2 seconds.
That's why I said something seems wrong. I've never observed that the transmission goes to N first when pressing P and it taking 2 seconds. In my car and any other MB I've driven, I press P and it instantly goes into P. Let me be clear, though. The transmission obviously goes into N when parking. It has to be in N, so the engine can start the next time, but the part that is odd, is that it takes 2 seconds in your case to go into P.
Originally Posted by chassis
P parking pawl in the transmission is not the same as parking brake engagement. Unsafe condition if P is not engaged when engine is turned off at nearly the same time as P is chosen.
Was this not clear to anybody? Parking pawl is inside the transmission and engages with going to P. As said, in my experience that's practically instantaneous when pressing P. Maybe a fraction of a second at most as it is a piece of mechanic that has to move. The parking brake takes a little longer as the electric motor has to tighten the rear brake pads, but as said that starts automatically as soon as the engine is turned off.
FWIW, I keep my foot on the brake until the parking brake finishes engaging. My garage floor is slightly slanted, so if I don't do that, then the car rolls slightly until the weight all hangs on the parking pawl, which is not recommended. So I wait until the parking brake is engaged, in order for the weight of the car to be held by the parking brake and not the parking pawl.
Last edited by superswiss; Sep 24, 2024 at 12:59 PM.
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