[1stiski]

Easy fix , but I needed a a way to reset and check to be sure so I purchased an Autel Maxicom ML808, which allows many functions to be accessed including airbag resets . The tool showed a high resistance in the driver shoulder belt tensioner.. out pops the rear drivers side panel Open the access panel (easy , remove the torx screw , pull the Rear boot weather strip and just pull it away from the body ) there are nice easy attachment bungs that hold it in. I unplugged the electric connectors (car keys out of ignition) and cleaned both sides of the plug with electric contact cleaner and dielectric grease on the ends , Re plugged and checked the tool again . The fault cleared . You could not see Any visible corrosion !!!, but obviously there was enough to throw out the values . WOW . Easy fix without going to a mechanic. I can only imagine that a Smart / Benz dealer would of just replaced the tensioner ($$$) my two cents .

 

[Shalmaneser64]

I’ve not been impressed with the overall quality of the smart wiring harness. Fabric tape holding parts of it together and such. Not that anyone else seems to be doing it any better these days.

 

[1stiski]

I’ve not been impressed with the overall quality of the smart wiring harness. Fabric tape holding parts of it together and such. Not that anyone else seems to be doing it any better these days.

Well it really wasn’t an wire issue , the problem is the connectors to the harness. I believe they should of used the moisture resistant type sealing plugs on these items since even the slightest imperceptible corrosion throws off the values and disables the system .

 

[Shalmaneser64]

Poorly wrapped harness is only part of the problem, but indicative of a poor design. I agree that connectors in such an environment should be much more robust.