Loud Knock After Not Driving Car for Weeks
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2013 E350 Sport Wagon - 4Matic
Loud Knock After Not Driving Car for Weeks
After not driving my car (2013 E350 Wagon) for a few weeks on numerous occasions, I've noticed that on the initial start after the relatively long sit, a clunking noise is experienced along with the vehicle seeming like it doesn't want to move. I have to step on the gas pedal a little harder than I normally would have to simply to get it to move. Any ideas to what this could be? Sorry for the vague description...don't know how else to explain what is going on. Thanks.
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Ok, I am running a 2011 version so pure guess.
Are you getting any indication the car is rising please wait?
My car has air suspension in the rear only and if it sits for several weeks I get this message and if I go too soon the suspension is flat.
Are you getting any indication the car is rising please wait?
My car has air suspension in the rear only and if it sits for several weeks I get this message and if I go too soon the suspension is flat.
Last edited by Alex.currie44; Feb 8, 2015 at 09:49 PM.
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2013 E350 Sport Wagon - 4Matic
No indication of that sort or any other. I always let the car run for 10 mins or so before pulling out...more than enough time for the rear air suspension to rise. Thanks though. Can you think of anything else?
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2013 E350 Sport Wagon - 4Matic
The only other thing I can think off is that I washed the car before parking it for the few weeks. I noticed the rotors were orange (I assume rust)...could that have anything to do with it?
BTW, after the until start-up, the car behaved normally for the rest of the day.
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From: Sidney, BC
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In my experience brake rotors will rust in hours after a wash if they don't get dried as they will over night in the rain or even snow. It is a fine layer and cleans up pretty quick on the first application of brakes.
Does it seem to come from one particular area of the car?
How long does it sit after your run after the initial start up? 2 hr? 6 hr? If it sits for 8 hr after you get rid of this noise does it come back after the 8 hrs?
My mind is wondering if the exhaust is loose when cold and it tightens up when it gets warmed up.
With 3000 mile why not take it to your dealer, get a loaner and leave with them to find it and fix it?
Does it seem to come from one particular area of the car?
How long does it sit after your run after the initial start up? 2 hr? 6 hr? If it sits for 8 hr after you get rid of this noise does it come back after the 8 hrs?
My mind is wondering if the exhaust is loose when cold and it tightens up when it gets warmed up.
With 3000 mile why not take it to your dealer, get a loaner and leave with them to find it and fix it?
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2013 E350 Sport Wagon - 4Matic
If I accidently engaged the parking brake when I last exited the car, would it automatically disengage by pressing on the gas pedal or would I have to manually disengage it by pulling the parking brake lever? Just asking because if it's the former, maybe I did accidently engage it. If it's the latter, I know I didn't accidently engage it because I definitely haven't manually disengaged it by pulling on the level (and there was no parking indicator on the dash today).
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In my experience brake rotors will rust in hours after a wash if they don't get dried as they will over night in the rain or even snow. It is a fine layer and cleans up pretty quick on the first application of brakes.
Does it seem to come from one particular area of the car?
How long does it sit after your run after the initial start up? 2 hr? 6 hr? If it sits for 8 hr after you get rid of this noise does it come back after the 8 hrs?
My mind is wondering if the exhaust is loose when cold and it tightens up when it gets warmed up.
With 3000 mile why not take it to your dealer, get a loaner and leave with them to find it and fix it?
Does it seem to come from one particular area of the car?
How long does it sit after your run after the initial start up? 2 hr? 6 hr? If it sits for 8 hr after you get rid of this noise does it come back after the 8 hrs?
My mind is wondering if the exhaust is loose when cold and it tightens up when it gets warmed up.
With 3000 mile why not take it to your dealer, get a loaner and leave with them to find it and fix it?
Will definitely take to the dealer...just want to make sure I'm not missing something first.
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Next startup try putting into sport mode before reversing
These cars have two reverse gears... See if it makes a difference
Re: parking brake ... A light should illuminate on dash if it's significantly depressed
These cars have two reverse gears... See if it makes a difference
Re: parking brake ... A light should illuminate on dash if it's significantly depressed
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Will do. However, I had backed in the garage so was actually going forward when this last happened today. It has happened going in reverse as well in the past though.
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Two reverse gears? I have never heard of that. I always knew the "Comfort" start was a second gear start vs. first in "Sport" but did not realize there was a second reverse. Ratios are quite different too 3.4 vs 2.2. Interesting.
Not sure why one would want it. It is not as if we drag off the line going backwards!
Not sure why one would want it. It is not as if we drag off the line going backwards!
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Two reverse gears? I have never heard of that. I always knew the "Comfort" start was a second gear start vs. first in "Sport" but did not realize there was a second reverse. Ratios are quite different too 3.4 vs 2.2. Interesting.
Not sure why one would want it. It is not as if we drag off the line going backwards!
Not sure why one would want it. It is not as if we drag off the line going backwards!
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Peter that is incredible. Thanks for all the info.
I would never consider a second reverse.
If you think about it I guess it has an application in snow just as the 2nd gear start is better in snow even with ESP.
The interesting fact is my W208 5 spd had it as did my 2003 W211 RWD and my W211 2009 wagon as well as it was 5 spd as well.
This is great info. Thanks again.
I would never consider a second reverse.
If you think about it I guess it has an application in snow just as the 2nd gear start is better in snow even with ESP.
The interesting fact is my W208 5 spd had it as did my 2003 W211 RWD and my W211 2009 wagon as well as it was 5 spd as well.
This is great info. Thanks again.
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2013 E350 Sport Wagon - 4Matic
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2010 E550 4Matic, P1, P2
What I would do is after you have stored for a long time when ready to drive the car do the following. Put car in drive and release parking brake, hit the gas lightly and move forward about half a wheel spin. Put the car back in park and get out to look at the rotors. If the brakes were sticking you should see marking on the rotor where the pads were stuck that will look different then the rest of the disk. Try to use the brake as little as possible when doing this since once the pad touch the disks a few times it will clean everything up
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2013 E350 Sport Wagon - 4Matic
What I would do is after you have stored for a long time when ready to drive the car do the following. Put car in drive and release parking brake, hit the gas lightly and move forward about half a wheel spin. Put the car back in park and get out to look at the rotors. If the brakes were sticking you should see marking on the rotor where the pads were stuck that will look different then the rest of the disk. Try to use the brake as little as possible when doing this since once the pad touch the disks a few times it will clean everything up
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From: Toronto, ON
2010 E550 4Matic, P1, P2
Let us know next time you have a chance to test it out
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I leave my car for 8 weeks at a time on occasions and always wash it before I put it away. I make a point of doing some hard braking maneuvers to dry the pads and rotors before I do.
I will see some light surface rust on the rotors when I get back that is gone after the first braking cycles as a rule.
If the testing reveals that it is brake related it suggests to me a caliper or calipers are not functioning correctly and the pads are being left under pressure against the rotor.
My wife's Matrix experienced that a few weeks back the difference being we could not get it to release under any conditions so the caliper was replaced. We did both fronts at the same time to be sure.
I will see some light surface rust on the rotors when I get back that is gone after the first braking cycles as a rule.
If the testing reveals that it is brake related it suggests to me a caliper or calipers are not functioning correctly and the pads are being left under pressure against the rotor.
My wife's Matrix experienced that a few weeks back the difference being we could not get it to release under any conditions so the caliper was replaced. We did both fronts at the same time to be sure.
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2013 E350 Sport Wagon - 4Matic
Drove the car today after 5 days of being parked. Car did not experience the loud knock as experienced last weekend. Car was not washed this time before the 5 day sit. Looks like it was the brakes. Will have to do a better job of drying the brakes after a good cleaning.
