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2012 Mercedes - wheel bolts instead of studs #4894137
10/11/18 06:18 PM
10/11/18 06:18 PM
Joined: Jul 2014
Posts: 1,185
Winnipeg MB CA
Number_35 Online content OP
Number_35  Online Content OP

Joined: Jul 2014
Posts: 1,185
Winnipeg MB CA
Earlier today I installed the winter tires (mounted on alloys) on a friend's 2012 Mercedes C300. It was interesting to see that this car uses bolts into threaded holes in the hubs to hold the wheels on, rather than the much more common studs and lug nuts. I saw this on a few Mazdas back in the '70s, but had not seen it since. It makes installing the wheels a bit of a challenge.

Is this standard for Mercedes? Any other manufacturers? What are the advantages?

Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894140
10/11/18 06:24 PM
10/11/18 06:24 PM
Joined: Jan 2010
Posts: 1,560
Los Gatos, CA
JeffKeryk Offline
JeffKeryk  Offline

Joined: Jan 2010
Posts: 1,560
Los Gatos, CA
VW's used wheel bolts instead of studs.


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Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894141
10/11/18 06:26 PM
10/11/18 06:26 PM
Joined: Oct 2002
Posts: 37,508
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline

Joined: Oct 2002
Posts: 37,508
Great Lakes
It's standard for most of the German makes, AFAIK.


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Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894163
10/11/18 06:46 PM
10/11/18 06:46 PM
Joined: Apr 2017
Posts: 1,818
Ohio
hallstevenson Offline
hallstevenson  Offline

Joined: Apr 2017
Posts: 1,818
Ohio
A co-worker has a '17 VW Tiguan and it uses bolts too. It sucks compared to studs. At least with studs you can kinda hook/hang the wheel while lining things up.

Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894165
10/11/18 06:50 PM
10/11/18 06:50 PM
Joined: Mar 2013
Posts: 5,554
The Midwest
skyactiv Offline
skyactiv  Offline

Joined: Mar 2013
Posts: 5,554
The Midwest
Yes on it being a German thing. Both cars in my signature use wheel bolts. Mercedes Sprinter vans also use wheel bolts.

Using lug bolts also gives you more variation in terms of the wheels and offsets you can use. You can use longer bolts and spacers for different wheel offsets.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual

Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894166
10/11/18 06:51 PM
10/11/18 06:51 PM
Joined: Nov 2011
Posts: 1,594
Lyndhurst NJ
Audios Offline
Audios  Offline

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Posts: 1,594
Lyndhurst NJ
BMW has had it since the 80s, All european cars have had it since I started working on cars in 2001.


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Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894168
10/11/18 06:54 PM
10/11/18 06:54 PM
Joined: Feb 2016
Posts: 198
NY
fcjeep Offline
fcjeep  Offline

Joined: Feb 2016
Posts: 198
NY

My wife's 2014 Jeep Cherokee had the same set up. Yes it's a little bit of a PITA to put the wheel back on.
I don't know yet about her 2016 Grand Cherokee as I haven't pulled a wheel yet.


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Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894180
10/11/18 07:12 PM
10/11/18 07:12 PM
Joined: Oct 2007
Posts: 416
Ga
DB_Cooper Offline
DB_Cooper  Offline

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Posts: 416
Ga
In the tool kit on most German cars is supposed to the a threaded "Wheel Hanger", check you owners manual. Some are plastic and others steel. If you know the metric thread size you can order one from Amazon for about $10. Available in 12x1.5 14x1.25 etc. Makes the job much easier.

Steel wheel hanger $10


Last edited by DB_Cooper; 10/11/18 07:14 PM.
Re: 2012 Mercedes - wheel bolts instead of studs [Re: Quattro Pete] #4894184
10/11/18 07:15 PM
10/11/18 07:15 PM
Joined: Sep 2009
Posts: 16,695
OH
fdcg27 Offline
fdcg27  Offline

Joined: Sep 2009
Posts: 16,695
OH
Originally Posted by Quattro Pete
It's standard for most of the German makes, AFAIK.


Like QP said. Every German car I've owned had lug bolts rather than studs and nuts.
Every car also had some sort of helper included in the original tool kit from which you could hang the wheel while threading in a couple of the bolts.
Not sure why this particular design was used, but I'm sure that Trav will be along to give us the reason.


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Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894191
10/11/18 07:20 PM
10/11/18 07:20 PM
Joined: Nov 2006
Posts: 21,942
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,942
MA, Mittelfranken.de
Originally Posted by Number_35
Earlier today I installed the winter tires (mounted on alloys) on a friend's 2012 Mercedes C300. It was interesting to see that this car uses bolts into threaded holes in the hubs to hold the wheels on, rather than the much more common studs and lug nuts. I saw this on a few Mazdas back in the '70s, but had not seen it since. It makes installing the wheels a bit of a challenge.

Is this standard for Mercedes? Any other manufacturers? What are the advantages?


Just use a hanging stud, you can but one or just cut a bolt, its a non issue. One advantage is you don't need to remove the caliper bracket to swap the rotor just remove one caliper pin bolt and flip it up.
Another reason is in Europe most drivers have aluminum wheels for the summer and steel for the winter, they use different length bolts.

https://www.amazon.com/Steel-Wheel-Hanger-Automotive-Volkswagen/dp/B00MWAQGSQ


ASE L1, Master. Deutsch Meisterbrief.
Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894192
10/11/18 07:21 PM
10/11/18 07:21 PM
Joined: Dec 2014
Posts: 470
Huntington WV
dbias Offline
dbias  Offline

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Huntington WV
My VW and Audi have them and it just takes a little getting used to. There is a dowel type thing in my tire change kit that you can stick in a hole to help line up but I've never used it. Being hub centric the wheels fit snug to the hub so I just jam it up there and spin to line up the holes. On the audi wheels there is a slight indentation on the backside that makes a slight rust mark where water gets into the indentation and makes a distinctive mark on the rotor surface where the wheel snugs up to so once I have the wheel on the hub I just spin the wheel until the rust mark lines up with the indentation and presto bolts drop right in.


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Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894212
10/11/18 07:43 PM
10/11/18 07:43 PM
Joined: Feb 2009
Posts: 8,813
Texas
440Magnum Offline
440Magnum  Offline

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Posts: 8,813
Texas
The last car I had with lug bolts was my 1949 Plymouth. I've seen it more recently on light-duty trailer axles.


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Re: 2012 Mercedes - wheel bolts instead of studs [Re: DB_Cooper] #4894230
10/11/18 08:02 PM
10/11/18 08:02 PM
Joined: Jul 2014
Posts: 1,185
Winnipeg MB CA
Number_35 Online content OP
Number_35  Online Content OP

Joined: Jul 2014
Posts: 1,185
Winnipeg MB CA
Originally Posted by DB_Cooper
In the tool kit on most German cars is supposed to the a threaded "Wheel Hanger", check you owners manual. Some are plastic and others steel. If you know the metric thread size you can order one from Amazon for about $10. Available in 12x1.5 14x1.25 etc. Makes the job much easier.

Steel wheel hanger $10


Thanks all for the feedback. I bet there was something there, but I didn't think to look for it. (If you don't know a thing exists, you don't look for it.)

Another interesting thing was that the car came with one anti-theft bolt per wheel (plus four normal hex-head bolts per wheel). Each anti-theft bolt had a very complex pattern (which was the same for all four anti-theft bolts), and there was a matching male key. I was worried that I wouldn't get the anti-theft bolts off, but they weren't too bad. Some of the other bolts were on way too tight; I guess having to use a key prevented the last shop from torquing the anti-theft bolt down as hard as the others.

Re: 2012 Mercedes - wheel bolts instead of studs [Re: hallstevenson] #4894250
10/11/18 08:34 PM
10/11/18 08:34 PM
Joined: Oct 2002
Posts: 37,508
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline

Joined: Oct 2002
Posts: 37,508
Great Lakes
Originally Posted by hallstevenson
A co-worker has a '17 VW Tiguan and it uses bolts too. It sucks compared to studs.

When they corrode and rust away, what's cheaper and easier to replace: studs or bolts?


'02 530i (Edge 0W-40)
'15 Q5 3.0T (Edge 5W-40)
'18 Charger SRT (PUP 0W-40 SRT)
Re: 2012 Mercedes - wheel bolts instead of studs [Re: Number_35] #4894255
10/11/18 08:37 PM
10/11/18 08:37 PM
Joined: Nov 2006
Posts: 21,942
MA, Mittelfranken.de
Trav Offline
Trav  Offline

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Posts: 21,942
MA, Mittelfranken.de
I wonder how many people remember left hand thread studs and lug nuts on one side of Chrysler and GM vehicles.


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