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Old 01-25-2014, 07:23 PM   #15
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That's good to know about the RF controller. It seems like a very simple setup that will work well for me. Not drilling or cutting.

I thought I read in these forums that MB fixed the LED trailer light issue. I'll look into it some more.

I am planning a trip to Ontario this summer to visit family and I am going to Cam-Am to have their staff reinforce our hitch and tune the setup. Also a welded shorter shank and any WD adjustments necessary to balance our rig to stay well within any load limits imposed by payload or axle weight ratings. I very confident that 455 lb-ft of torque and 1750 lbs of payload that the GL will be a great match for our trailer and our family needs.
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Old 01-26-2014, 06:21 PM   #16
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On our 25FB, the dealer installed a couple of regular incandescent light bulbs under the bed in the brake circuit and then the 2007 Mercedes ML320 CDI diesel was happy to recognize that a trailer was attached.
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Old 01-27-2014, 05:29 AM   #17
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Quote:
Originally Posted by switz View Post
On our 25FB, the dealer installed a couple of regular incandescent light bulbs under the bed in the brake circuit and then the 2007 Mercedes ML320 CDI diesel was happy to recognize that a trailer was attached.
This is the same fix that Andy at CanAm advised, unfortunately I had already bought the special connector and sometimes a Dodge truck pulls my trailer and it doesn't have the blinking LED issue. Think your dealer also installed lights in the turn and running light circuits as well...or at least this is what Andy advised.
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Old 02-28-2014, 12:33 AM   #18
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I purchased 3 outside light fixtures form Inland RV yesterday, planning to install them in all three circuits as recommended by CanAm. Hopefully that will solve the blinking light problem.
I like to thank Andy for sending me the wiring diagram.
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Old 03-03-2014, 10:59 PM   #19
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Blinking lights with Mercedes GL350

Happy to report that after installing the lights in three circuits according to my previous post the blinking has gone away.
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Old 03-03-2014, 11:00 PM   #20
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I am curious as to why you chose the GL-450 rather than the GL-350?
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Old 03-04-2014, 08:02 PM   #21
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More power?
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Old 03-05-2014, 01:43 AM   #22
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It is confusing to me which actually does have more power. 2014 specs are below. I don't know how to tell which will be better at towing and it's making me nuts. Seems the Diesel has more torque at a lower rpm while the gas has more horsepower but at a much higher rpm. What is more important?

GL350 BlueTEC SUV
3.0L turbodiesel V-6
Towing Capacity 7,500lbs ‡
Horsepower 240hp@3600 rpm
Torque 455lb-ft@ 1,600-2,400 rpm

GL450 4MATIC SUV
4.6L biturbo gasoline V-8
Towing Capacity 7,500lbs ‡
Horsepower 362hp@5,000-6,000 rpm
Torque 406lb-ft@ 1,500-4,000 rpm
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Old 03-05-2014, 04:47 AM   #23
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It's all about the torque. The torque comes in so much lower that you miss all the trans downshift theatrics and the motor is in the torque sweet spot as you cruise down the interstate. Range and mileage are dramatically increased as well. If you only tow a small amount then the torque doesn't come into play quite as much.
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Old 03-05-2014, 08:35 AM   #24
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I have not driven the new 450, but just looking at numbers

Actually, the 450 has 406 ft-lb of torque from a low RPM as well, and it has that max torque over a wider range than 350.

More horsepower means it can tow at a faster speed.

350 will have much better fuel economy though, and the Diesel engine is built like a tank so it should be much more durable, towing or not
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Old 03-05-2014, 08:40 AM   #25
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Think of it this way: how much you can tow depends on torque. How fast you can tow depends on horsepower.

A vehicle with a torque of 400 can tow more than a vehicle with a torque of 250.

A vehicle with torque of 400 and HP of 400, can tow faster than a vehicle with torque if 400 and HP of 200.
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Old 03-05-2014, 09:31 AM   #26
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When I ordered my 2007 ML with the diesel, the actually a 3 liter V6 diesel had substantially more torgue than the V8 gas engine, especially at the low end for towing and normal driving. The V8 has more horsepower at high rpms that would not normally be in the range for towing or driving for that matter.

I get 28 mpg on the highway where the V8 gets in the low teens.
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Old 03-05-2014, 09:47 AM   #27
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If I'm not mistaken, the new gasoline engines are direct injection and have a fat max torque curve from low RPMs. 406 of torque is what Touareg TDI produces.
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Old 03-05-2014, 10:54 AM   #28
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So is that 2 votes diesel, 1 vote gas and 1 vote for either?

The fuel economy is 14/19 for gas and 19/26 for the diesel.

The 0 - 60 time of the gas is about 7 seconds as opposed to the diesel of 10 seconds but both felt like they could GO.

I can't decide! I have a GL350 on order but won't get it until at least mid June and I think my impatience is making me second guess my decision. I am realistically only going to tow about 6 times per year, if I am lucky.
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