Is There a Rear Helper Spring Available for a 2012 Mercedes GLK350 4matic?  

Question:

Expert Reply:

If you are experiencing sag while towing, we may have an option available for you, but, the suspension enhancement systems that we carry do not have an application that fits your 2012 Mercedes-Benz GLK350, unfortunately. This is most likely due to how your rear suspension is designed and operates. A lot of luxury vehicles have specially designed suspension to provide the best handling and ride possible. Some of these systems are also controlled by an on-board computer and adding suspension enhancement might interfere with the vehicle's suspension system.

With that being said, you may be able to use a weight distribution system to help with sag. I wasn't able to find much on if you GLK350 is rated for this so you will need to contact a Mercedes dealer to confirm compatibility, but choosing the correct system will depend on the weight of the trailer. Your Trailer's loaded tongue weight should fall as close to the middle of the system's capabilities as possible.

As an example, if your loaded tongue weight was 250 pounds, the Blue Ox SwayPro # BXW0350 will be a good option. With this having a minimum tongue weight of 150 pounds and a maximum of 350 pounds, it will put you right in that sweet spot and give you the best results.

expert reply by: Lazer S

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