Davycc
Active Member
- Joined
- Apr 5, 2017
- Messages
- 228
- Car
- 2001 W203 C320 Elegance
Like a few others I was getting an error warning from my drivers side front parktronic system (really annoying) would go off as soon as I reduced speed enough to engage it,guaranteed to happen within a few hundred yards . It would happen in dry or wet conditions so today I decided to jump in and try to fix it. I removed the bumper trim housing the sensors good link here
Mercedes-Benz W203 Exterior Molding Replacement - (2001-2007) C230, C280, C350, C240, C320 | Pelican Parts DIY Maintenance Article
I cleaned all 3 sensors and replaced them and refitted the trim, no joy.
Next I swapped the passenger side sensors one by one to find the faulty one if possible. After swapping all three the fault was still the same on the drivers side.
Assuming (dangerous I know) that it wasn't a sensor I had nosey around and saw rubbing marks on the metal bodywork behind the sensor housings where the loom had been rubbing. There's not a lot of play to check the loom but 2 of them were "flattened" slightly so I taped up the loom and taped over the metal bodywork as well, I would have used heat shrink but the sensor plugs prevented slipping the heat shrink over the loom.
Just back in from driving and stopping, slowing down etc and all is good in the world again.
I've attached a pics of the offenders.
Maybe worth checking out if you have the same issue before buying replacement sensors.
Davy
Mercedes-Benz W203 Exterior Molding Replacement - (2001-2007) C230, C280, C350, C240, C320 | Pelican Parts DIY Maintenance Article
I cleaned all 3 sensors and replaced them and refitted the trim, no joy.
Next I swapped the passenger side sensors one by one to find the faulty one if possible. After swapping all three the fault was still the same on the drivers side.
Assuming (dangerous I know) that it wasn't a sensor I had nosey around and saw rubbing marks on the metal bodywork behind the sensor housings where the loom had been rubbing. There's not a lot of play to check the loom but 2 of them were "flattened" slightly so I taped up the loom and taped over the metal bodywork as well, I would have used heat shrink but the sensor plugs prevented slipping the heat shrink over the loom.
Just back in from driving and stopping, slowing down etc and all is good in the world again.
I've attached a pics of the offenders.
Maybe worth checking out if you have the same issue before buying replacement sensors.
Davy
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