the radius, or curve shape,  of the ball face is the issue.
there's a guy on eBay that specializes in this stuff, and can supply the
exact right thing  I think...
14 mm nuts with the right ball face to match the Benz wheels.

----- Original Message -----
From: "levi hawkins" <b1levi@YAHOO.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, June 09, 2010 1:50 PM
Subject: Re: Mercedes Wheels Installation Question 90 GL

> Another BTW,
> You don't want to use vanagon ball seat lugnuts, they don't fit the clk
> interior contour correctly.
> Vanagon ball seats are 14mm, and too large for the 12mm seat of the
> mercedes, even though the hole is drilled out to 14mm, you really need to
> use a 12mm ballseat there.
>
> --- On Mon, 6/7/10, BenT Syncro <syncro@GMAIL.COM> wrote:
>
> From: BenT Syncro <syncro@GMAIL.COM>
> Subject: Re: Mercedes Wheels Installation Question  90 GL
> To: vanagon@GERRY.VANAGON.COM
> Date: Monday, June 7, 2010, 6:07 PM
>
>
>
> BTW, assuming you have the correct hardware to match the contours of
> the lughole. For example, you put a ballseat lugnut in a conical seat
> hole, you are applying the torque only in the portion that is
> touching. Think wooden ball on top of a book shelf vs. block of wood
> on the same shelf. Pressure would be at the point of the ball vs.
> Evenly distributed on the block of wood. Holding ability is
> dramatically different as torque on the wrong type of lugseat.
>
>
> BenT
>
> Sent from my mobile devicef
>
> On Jun 7, 2010, at 3:07 PM, Max Wellhouse <dimwittedmoose@CFU.NET>
> wrote:
>
>> Got the Vanco 2's mounted on the CLK 16" rims and they fit the front
>> with no issues or spacers and more than 7 full turns on the stock
>> wheel bolts/nuts.
>>