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About dguy

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    Beckwith Township, ON

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  1. Your friendly neighborhood MB dealer. Maybe the situation has changed since I last looked, but I never found an aftermarket source.
  2. The NAPA part was not appreciably more or less durable than the CTC part. If my wife & I were still commuting I would consider for the next replacement trying a "premium" flex pipe from a dedicated muffler shop, but we have both been telecommuting since March with no end to that in sight so it'll probably be another jobber-quality pipe when the time comes 'round again.
  3. If "chicken shit" means having limited interest in removing the belly pans and lying on my back with the car's undercarriage in my face, all the while getting dripped on by Krown & road grime, then guilty as charged.
  4. I'm not discounting non-stock tire sizes contributing to the issue, especially as the rears on our winter set are slightly narrower than OE at the moment. The summer set are the stock sizes however, and the issue was manifesting itself regardless of which tire set was installed. In any case, it has been roughly six weeks and 2,750-3,000km since the visit to Troy's shop and the issue hasn't re-occurred. I'm suspicious that it may have been a loose or dirty harness connector which was resolved by the multiple inspections. So for now, it ain't broke and I ain't fixing it!
  5. Yes the car was in at Troy's on Wednesday, which is where the diagnosis of a likely failing ABS module came from.
  6. No, Glenn is a minimum 12 hour round trip from here. My local go-to guy for Smart oddities is Troy Wilson (former MB mechanic at a local dealer). He has a Mercedes scanner but believes that it may not be sufficiently up-to-date in order to code in a new ABS module.
  7. To clarify, since upon review it looks as though I didn't leave much detail of the symptoms... oops. Dry weather - ABS/ESP warning lights will illuminate at random with no rhyme or reason, then reset after one or two ignition on/off cycles. Wet weather - the ESP system will frequently intervene as though the car is experiencing a skid or wheel spin when in fact everything is normal. The ESP light does not always flash when this is happening, but throttle cut and/or brake application of individual wheels is painfully obvious. Eventually it gives up and sets the warning lights. As with above, the system will eventually reset after a few ignition on/off cycles. A code for implausible signal from the left rear wheel speed sensor is set in all events, along with the "rough road sensor" red herring from my OP. All inspect-able elements of the system are in good shape - reluctor rings, wheel bearings, wiring harnesses, you name it. This pretty much leaves the ABS module as suspect. I know Delphi has the bleed function, but if it can't marry a replacement ABS module to the car I'm stuck with a stealership visit.
  8. Following up... Visual inspection of the left rear reluctor ring showed nothing out of the ordinary, so I replaced the sensor. No change. Many kms and another visual inspection of the components later, and I opted to run the car out to Troy W. His analysis: The ABS/ESP warning lights came on during a road test, however a live data scan showed a good signal from all speed sensors. No excessive play in the wheel bearing. The rear tires are a hair undersize compared to OE, but not enough to trigger a speed differential code. Wiring from the rear speed sensors up to the ABS module is perfect. All signs are pointing to the ABS module not appreciating wet conditions. I know that Delphi and a DS-100 can perform an ABS module bleed. Does anyone happen to know if it can also marry a new ABS module to the car, or is that a dealer visit?
  9. Continuing from here. (TLDR - rusty old mounting screw for 3rd brake light snapped off inside the spoiler) I had little enthusiasm for trying to drill out the screw remnants, even on a press. Using a couple of small cardboard tubes as forms, I built up the area around each mounting post in the spoiler with epoxy until I had a flat surface, removed a few small ribs from the back of the third brake light housing, applied a set of 3M Dual Lock pads, pressed it all together, and done. A bit of fiddling was required to set the height of the surfaces within the spoiler such that the light would sit near-flush once the fasteners were added, but that was the worst of it. Hope this helps someone else down the road.
  10. I'm definitely not discounting a cracked ABS ring, but from my experience they're an "on or off" issue. Once they crack sufficiently to throw off a sensor reading, the error will persist until resolved. This really is a sporadic wet weather-only error at the moment.
  11. After some bathroom reading, it would seem that P0318 is set when data from any of a collection of sensors may be interpreted as a rough road contributing to the anomalous reading. In other words, P0318 is somewhat of a red herring. We also have an intermittent implausible signal from the left rear wheel speed sensor. It won't surprise me if resolving that will clear the "rough road" error as well.
  12. P0318, intermittent open circuit. From a scan with Delphi 2015.3 and a DS-100E.
  13. Hello, Does anyone happen to know the location of the Rough Road Sensor in a 451? OBD claims that ours has an intermittent open circuit and I would like to check it out. -d.
  14. Tried to change the bulb for the third brake light, only to discover that the manufacturer's selection of fastener materials is far from Smart. Now I have crusty rusty screw remnants broken off inside the plastic spoiler. Yay.
  15. Use MIG or TIG and apply the weld between the inside of the nut and the bolt head and you should have minimal mess. Coat the area of the wheel immediately around the bolt with plumber's heat blocking gel if you're worried and/or want easier clean-up. Flux core, or stick need not apply unless you really don't care about spatter.