MikeP

Help: Install of Cruise Control killed 2007 450CDI.

16 posts in this topic

I am in Canada and have the Canadian version. I installed an aftermarket Smart Madness DIY Cruise Control, supposedly for the 2007 450 CDI Diesel Pulse Smart Car. ItI didn't work so I called for help. They suggested that I swap the wiper and speedo wires onto their 'custom computer' board. Still didn't work so I removed ALL of the plug-ins, including the wiper stalk, and restored to original.

Here's what I get.

When ignition key is turned on I get the centre console square illuminated, but NO engine lights, no gear indicator, nor mileage, nor temperature, nor fuel level indicators. All other functions, such as wipers, door locks, lights, radio, seem to work.  The engine will not start but there is a low whine (Not the starter motor) for a while, then stops. The OBDII meter indicates P0600 which generically means Serial Communications Link Malfunction.

I've checked all the fuses that seem to be part of the circuits that seem to be pertinent but all were OK.

I've made an appointment with Mercedes for next week and have loan of a suitable trailer to get it there but wonder what other things to try.

While I think it unlikely, I 'might' have broken, pinched, loosened, etc, a wire or connection, but I was working only with the main plug on the speedometer console, the smaller green connector and the accelerator connector.

Any ideas appreciated.

Mike .....>

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Mike, I'm sure others with chime in with more useful solutions to your issue.  In the meantime, a 450 CDI is diesel ..... only brought into Canada in the 2005 and 2006 versions. Are you sure your car is a 2007? ..

 

I see you are in Ontario.  Roughly where?  Ottawa, Toronto, Windsor, Boonies or ... ?  (This can help if there is someone in your area who could do a hands-on assist)

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It's best, with the 450, to use only OE cruise control.  Eddy can do it in Vancouver, and Glenn can do it in London Ontario.

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1 hour ago, MikeP said:

The engine will not start but there is a low whine (Not the starter motor) for a while, then stops.

 

the low pressure fuel pump starts, and eventually stops because the engine did not start

that is all good, but all the rest of the no-lights is not good

 

Have you tried re-seating the accelerator plugs, and checked the connections there for continuity. This is an old car, and that plug that has not likely seen any exercise in it's life, it could easily have lost grip on a connector or 2

 

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I guess it is a misterdotcom cruise control. Very quick and easy to install if one is sufficiently Smart and ones head is correctly screwed on. 

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Posted (edited) · Report post

yes, mine is an MDC ... was not any problem

So the SmartMadness one is an MDC as well ? Yes, did a search ... it is

 

So MikeP ... where are you in Ontario

 

edit :

but the originals sold way back then, did not have that 'cute' little box down by the accelerator, it was just a naked board, so yes, there are possibly differences

Edited by cadillacman

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Leadwing is correct. It is a 2006 and has only 44,000 km on it. Yes, it was a misterdotcom cruise control and it was installed carefully by myself, who has had a LOT of electronic experience. BUT, either I did make an error, or the control box supplied is defective. I can live without the Cruise Control, but hate it that something else was affected. Is there another fuse I don't know about?

Mike .....>

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another thought ...

Did you disturb the SAM unit ... remove any plugs ?

The N11-3 looses appropriate grip on a lot of it's pins, needs frequent re-seating

The N11-8 and N11-9 are really subject to corrosion and loss of contact

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MDC cruise was notorious for its poor quality control, a lot of new units were defective right out of the box.

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My mdc cruise control worked first time and still does after 15 years of service. 

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I am located near Penetanguishene, North of Barrie. I will be going to the Mercedes Dealer just S of Barrie, unless I come up with a fix.  Maybe I'll take apart the accelerator again and spray some Caig DEOX5 on the connector there. It seems that I had several slightly different conditions when I reconnected it, and, as mentioned, it is the one connector that is in a dirty part of the vehicle. For a while, it did start with no display and when I pushed the accelerator, it reved, but would not move even when gears were selected. It doesn't start now. However, I still feel that some safety shutdown or unknown fuse operated.

The 'control box' did NOT have 2 of the 3 small identical sockets identified nor was there a polarity indicated on the end big connector. The unit started flashing Amber when I turned on the ignition, an indication not identified in the troubleshooting guide. Flashing Red indicated a no CAN connection, also not explained. Until I had the covers off and half into the install did I see that the instruction pictures didn't match my vehicle at all - no White connector on the Speedometer, and the Control Board didn't look anything like the one on the PDF Install Guide. I did phone the Support Line and followed their verbal instructions and I matched them before powering up. I waited the 30 seconds for 'synchronizing' but no joy. 

Disappointment for sure!

Mike .....>

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Posted (edited) · Report post

see this

and this

 

I noted that all the current doc's I can find refer to the 451, even tho they 'say' 450

And the CSC link to the original instructions does not werk. Damn, I usually keep that sort of thing

 

Note the 'better' package list on this link

And also the last paragraph

 

They did indicate on that package list that the control arm is indeed an original smart item. Believe them ? or not ?

If the MB dealer in Barrie is at all willing to help sort out this mess, then they might be willing to supply the TAN and install it for you.

Edited by cadillacman

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Yeah my dealer in Victoria activated cruise control with a TAN.

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I offer cruise control TAN activation etc for a pint of good ale. 

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If you weren't an ocean away I would be there in a flash, as I'm sure Mike would!

 

If you ever decide to travel to Canada I will offer to put you up and show you parts of this beautiful country.

In fact I'm sure I could place a smart car at your disposal.

Cheers mate!

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NWell, the DEAD problem was solved. I put the Smart on a trailer and took it to Glenn - 290km away. On back roads that was 4 3/4 hours. After head scratching and checking connections, Glenn found that a main wire in the speedo hub connector wasn't making good contact. It was a small German connector and the wires must have had some corrosion in the connector. Cleaning spray and good reseating solved that problem.

Now the Cruise Control never did work and none of the older spare boards Glenn had would so I am still out of luck there. Glenn then lubed and adjusted the clutch system, fixed some potential hose problems, replaced 2 rear bulbs and gave some really good advice on potential future problems. The A/C has a design problem that could cause water to leak into the passenger front section. We 'fixed' that and now I 'shouldn't' have water under the front foam beside the battery.

While not the total items I was hoping for, I am pleased that the car is running properly again. It does appear that in this car, even with low mileage, corrosion of electrical connections happen and this can be a source of problems. 

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