Which wheels are locked when in park - Mercedes-Benz Forum

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Old 02-11-2010, 04:05 PM   #1 (permalink)
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Which wheels are locked when in park

Can anyone tell me how many i.e two or all wheels are locked when it is in park.
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Old 02-11-2010, 04:31 PM   #2 (permalink)
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all wheel drive = all wheels locked
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Old 02-11-2010, 05:54 PM   #3 (permalink)
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It depends on what you consider locked. For all practical reasons all 4 wheels are locked however the following can exist. If the ML is in park and is on a lift you can turn any wheel so they are not truly locked. If the ML is on one jack stand and one wheel is off, the vehicle can roll. If the ML is in park and one wheel is off the ground on a jack it can roll. Remember that the ML has 3 open differentials. So depending on what you are doing it is always best to chock the wheels when working on the vehicle.
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Old 02-11-2010, 07:37 PM   #4 (permalink)
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Originally Posted by Mike's ML View Post
It depends on what you consider locked. For all practical reasons all 4 wheels are locked however the following can exist. If the ML is in park and is on a lift you can turn any wheel so they are not truly locked. If the ML is on one jack stand and one wheel is off, the vehicle can roll. If the ML is in park and one wheel is off the ground on a jack it can roll. Remember that the ML has 3 open differentials. So depending on what you are doing it is always best to chock the wheels when working on the vehicle.
Mike
I guess I have to preface everything here...

If you ever jack up any wheel of ANY vehicle, the vehicle should be properly chocked and the parking brake should be applied.

I thought he was talking about parking not jacking it up to work on it.....
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Old 02-11-2010, 11:23 PM   #5 (permalink)
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I guess I have to preface everything here.......
If it's any consolation rudedude, I thought you gave an appropriate answer to the specific question asked by the original poster.
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Old 02-12-2010, 02:46 AM   #6 (permalink)
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OP question is out of context. My answer is NONE. Putting vehicle in Park does not lock any of the wheels.
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Old 02-12-2010, 03:22 AM   #7 (permalink)
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OP question is out of context. My answer is NONE. Putting vehicle in Park does not lock any of the wheels.
Witek, this is not meant as a challenge/dispute of what you have said above but I find that when my truck is on an incline and the transmission is in PARK, the truck will not move.

Could one not say therefore that the wheels have been 'locked'?

What stops the truck from moving?

ps.

On a lighter note and not wishing to engage in an English language debate, HOW could the OP's question be out of context?

'Context' means: the text in which a word or passage appears and which helps ascertain its meaning; the surroundings, circumstances, environment, background or settings which determine, specify, or clarify the meaning of an event

If the post was an ORIGINAL post how could it be out of 'context'?
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Old 02-12-2010, 03:49 AM   #8 (permalink)
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As English is not my first language I may goof up at times. Sorry.

Let me rephrase: OP question lacks context.
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Old 02-12-2010, 06:50 AM   #9 (permalink)
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Originally Posted by rudedude View Post
I guess I have to preface everything here...

If you ever jack up any wheel of ANY vehicle, the vehicle should be properly chocked and the parking brake should be applied.

I thought he was talking about parking not jacking it up to work on it.....
I agree with chocking when jacking any vehicle. An example of a properly chocked vehicle is shown below.

How many wheels does the parking brake wheel lock, 2 or 4?

If you park an ML on a steep incling and one wheel is on ice or very loose gravel the ML can slide even though the other 3 wheels are on solid ground and the ML is in park.

My intent was to give the OP a better understanding of the way an ML works. It may have been important to what he was trying to accomplish since he did not state Why he was asking the question.


Mike
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Old 02-12-2010, 06:54 AM   #10 (permalink)
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Talking

Mike,

Is that you working on the 2010 BMW X5?
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