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Old 05-02-2015, 07:08 AM   #15
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To suggest there is a liability issue reinforcing s hitch is the same as suggesting there's a liability issue installing wider rims or a lowered suspension. It's a total non issue.
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Old 05-02-2015, 07:15 AM   #16
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I had a local custom exhaust shop do mine. I bought the box section and plate from McMaster Carr (you can order on line) and then spent about 30 minutes with the owner and fabricator under the car on a lift explaining what I wanted via some photos of similar mods plus some sketches. Work was done very well. The mod CanAm does links the bottom of the receiver to the rear suspension crossmember with some box section and plate.

I'd do a search on Yellow Pages for Custom Exhaust Shop. Cross check some reviews on Yelp. Another option would be an import car or other tuning shop. They will often do pretty technical welding to install front mount intercoolers for turbo installs and the like so have the capability to easily handle this kind of fabrication work. Last but not least would be an old school hitch shop. Not many of these guys around these days though.

You will be responsible for the mod in the above cases if you provide sketches and material for the job.
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Old 05-02-2015, 10:29 PM   #17
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Quote:
Originally Posted by r carl View Post
You need a pic of a hitch already reinforced so it can be duplicated in NM.

Thank you
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Old 05-02-2015, 11:52 PM   #18
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Wasn't there a place in LA ?
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Old 05-03-2015, 09:19 AM   #19
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Jonnie3, I'll post some pictures of this type of mod when I get home later today (I'm camping right now). They are mods on a Touareg and an Audi Q7 if I remember correctly but the approach should be consistent for the Merc also.
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Old 05-03-2015, 01:01 PM   #20
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Originally Posted by JCWDCW View Post
My info on this is that CAN AM just add some extra braces to stop sideways wiggle, and by stressing the hitch into its desired tilt ( up or down) if necessary the braces hold the torsion bar in rigidly in place.

My hitch was tilted up so they put a bar in it and pried it down to level and welded braces from the hitch torsion bar to the truck frame. Rock solid compared to the original OEM bolted connection

However for uni-body vehicles that is a different matter and I've never actually seen what they do.. There is usually some extension frame for the bumpers but they must also add extra bracing to the uni-body panels to distribute forces rear to front when equalizers are taken up.

I would expect that any good hitch provider and installer could do the same thing. You just need to shop around a bit

JCW
On my unibody TV there was two additional braces added to the hitch receiver that are bolted to the body in the centre of the vehicle,not far from the rear axle (or what passes for an axle). This adds a third point fixing point (spreading the load) and helps prevent the torque generated by the WD system from twisting the whole setup upwards. It works.
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Old 05-03-2015, 08:34 PM   #21
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Click on "images" below my avatar. There is a picture of the underside of my 2007 Mercedes ML 320 CDI after CanAm welded another piece of receiver tubing and an extension forward to reinforce the factory hitch. The hitch had been re welded because of a recall.

They also cut off 5 inches or so of the Hensley stinger and drilled a new locking bolt hole to move the latch so close to the rear bumber a crescent wrench was needed for the locking nuts as the Hensley wrench could not fit over the nut. They also bent the stinger slightly to preload the adjustment arms to get more transfer forward.
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Old 05-06-2015, 05:11 PM   #22
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Quote:
Originally Posted by JCWDCW View Post
However for uni-body vehicles that is a different matter and I've never actually seen what they do.. There is usually some extension frame for the bumpers but they must also add extra bracing to the uni-body panels to distribute forces rear to front when equalizers are taken up.
Here's how Andy did it on my Traverse....welded two right-angle pieces of steel from my Class III hitch to the underside of the body. They and to drop the spare tire in order to fit the supports. You can see the points of attachment from these photos...





The purpose of the extra supports is to reduce vertical and lateral torsion forces and spread them -- they aren't intended to take on extra weight (i.e. they stop the hitch from flexing). BTW, my unibody Traverse is stronger/more rigid than my old Yukon due to the way GM engineered the box construction and filled the gaps with a "metalized" foam filler. The Traverse has an incredibly strong body.
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Old 05-06-2015, 08:18 PM   #23
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Thank you so much for the photos!
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