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Old 12-15-2014, 03:19 PM   #1
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Interstate Brake Controller

I was told by the dealer, the only way to install a brake controller is to hard wire the unit to the wires which is located under the driver seat. Run it underneath the carpet and install the controller somewhere near the dash board. In all my previous dealing with controllers they were always snap on connections specific for auto manufacturer (got the wiring from E-Trailer) and no need to strip wire to do a hard wire connection. The dealer also stated this is how MB does it.

Any thoughts or comment will be appreciated. I will use a P3 Prodigy unit.

Many thanks.

Titu.
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Old 12-15-2014, 03:24 PM   #2
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I was told by the dealer, the only way to install a brake controller is to hard wire the unit to the wires which is located under the driver seat. Run it underneath the carpet and install the controller somewhere near the dash board. In all my previous dealing with controllers they were always snap on connections specific for auto manufacturer (got the wiring from E-Trailer) and no need to strip wire to do a hard wire connection. The dealer also stated this is how MB does it.

Any thoughts or comment will be appreciated. I will use a P3 Prodigy unit.

Many thanks.

Titu.
That was my experiance. I had my dealer install a P2 prior to taking delivery and they did have to run wire from under the driver seat to the dash. Seems like MBZ only runs the wiring from the hitch location to the driver seat. Kind of dumb if you ask me.
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Old 12-15-2014, 03:38 PM   #3
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Thanks. That is what I will do.
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Old 12-15-2014, 04:19 PM   #4
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That was my experiance. I had my dealer install a P2 prior to taking delivery and they did have to run wire from under the driver seat to the dash. Seems like MBZ only runs the wiring from the hitch location to the driver seat. Kind of dumb if you ask me.
Dumb if you're towing a trailer. Not necessarily dumb if you're towing a toad. The supplemental brakes on my toad are activated by the brake light circuit, no separate brake controller required.
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Old 12-15-2014, 07:01 PM   #5
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I thought I read that connecting anything to the brake lite ckt would create chaos w/ the computer and how it senses bad bulbs.
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Old 12-15-2014, 08:50 PM   #6
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I thought I read that connecting anything to the brake lite ckt would create chaos w/ the computer and how it senses bad bulbs.
I don't know. It has worked just fine on mine since February 2013…
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Old 12-15-2014, 09:01 PM   #7
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If you have a light trailer you can just mount the control under the seat. You won't be able to see it but it will work fine.

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Old 12-16-2014, 07:59 AM   #8
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I installed mine myself and purchased a connector to fit the existing connector so did not have to cut into MB wires. Worked fine no problem.


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Old 12-16-2014, 08:06 AM   #9
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Thanks Andy. Hope all is well. Hope to visit you folks next year.

Also thanks PSCHW. Good advice.

Titu.
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Old 12-16-2014, 01:57 PM   #10
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+1 on PSchw's comment. There is a Mercedes connector under seat and if you get the correct matching connector there is no need to cut wires.


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Old 01-04-2015, 05:08 PM   #11
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Some more info to tie into the MB connector under the seat. Used this to wire a prodigy into the sprinter and extends the chassis ESP control to the trailer.

Parts: Brake controller install - Sprinter-Forum

Lead connections: install electric trailer brake controller on 07 - Sprinter-Forum
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Old 05-07-2015, 01:39 PM   #12
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Anyone have any luck installing a Tekonsha Wireless brake controller ? Even after talking to Tekonsha techs have not been able to pair the controller.
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