ML320 CDI Tow Package/Transmission Cooler Q
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ML320 CDI Tow Package/Transmission Cooler Q
Does anyone know if ML320 CDI that came equipped from the factory with a hitch has a different radiator or transmission cooler than one that didn't come from the factory with a hitch?
I've got a factory hitch I'm planning to install this weekend so I can use my 07 CDI (didn't come with a hitch) to pull my 6500lb trailer, but want to make sure I upgrade the transmission cooler if it is different so I don't cook my transmission when towing.
I've got a factory hitch I'm planning to install this weekend so I can use my 07 CDI (didn't come with a hitch) to pull my 6500lb trailer, but want to make sure I upgrade the transmission cooler if it is different so I don't cook my transmission when towing.
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From: Nova Scotia, Canada
2023 GLK250, 1987 560SL
The tow capacity for your vehicle is only 5,000lbs with the factory hitch. You may want to upgrade the hitch further if you're planning on towing 6,500lbs, and get an aftermarket cooler.
Also, do you have air suspension on the back? If not, you'll likely encounter some sagging if your tongue weight is above 500lbs.
The motor is plenty capable of pulling that much weight, but you will want to cut your engine oil change interval in half, as well as your transmission fluid.
Also, do you have air suspension on the back? If not, you'll likely encounter some sagging if your tongue weight is above 500lbs.
The motor is plenty capable of pulling that much weight, but you will want to cut your engine oil change interval in half, as well as your transmission fluid.
Thread Starter
MBWorld Fanatic!
Joined: Sep 2005
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From: Sacramento, CA
Ducati
The tow capacity for your vehicle is only 5,000lbs with the factory hitch. You may want to upgrade the hitch further if you're planning on towing 6,500lbs, and get an aftermarket cooler.
Also, do you have air suspension on the back? If not, you'll likely encounter some sagging if your tongue weight is above 500lbs.
The motor is plenty capable of pulling that much weight, but you will want to cut your engine oil change interval in half, as well as your transmission fluid.
Also, do you have air suspension on the back? If not, you'll likely encounter some sagging if your tongue weight is above 500lbs.
The motor is plenty capable of pulling that much weight, but you will want to cut your engine oil change interval in half, as well as your transmission fluid.
Last edited by justinwrock; Oct 25, 2016 at 07:07 PM.
MBWorld Fanatic!
Joined: Jun 2006
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From: Nova Scotia, Canada
2023 GLK250, 1987 560SL
My info could very well be wrong. I assume you meant 700 lbs tongue weight. Still, that must come with an upgraded rear suspension - does your friend have rear air suspension?
Thread Starter
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Ducati
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C230K ML320 CDI
You also need a new rear SAM module when you add towing. It adjusts the transmission shift points when trailer lights are plugged in, and I think it also may play a part in triggering the anti-sway program. If you're pulling a heavy trailer, I think it is essential.
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Joined: Jun 2006
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From: Nova Scotia, Canada
2023 GLK250, 1987 560SL
Some people have gotten away with using their existing rear SAM, but that seems to be hit and miss. You can save a lot of cost, time, and effort by buying a Curt powered splice-in kit. This is a $40 solution and works great, compared to the factory solution which, if you have to replace the SAM, is going to run you $1000+, and might only be marginally better.
The factory hitches are definitely better than any of the aftermarket ones that I've seen.
The factory hitches are definitely better than any of the aftermarket ones that I've seen.
