Amazing. Cheers.

I've checked all my wiring. Even soldered the bumper loom directly so there's no risk of future issues with having a plug.

I'm guessing it's fake "genuine" sensors I've purchased from ebay that are faulty after some use.

if I find a solution before you, I'll post it here.

 

I got a same error code after using china parking sensor.

Test with new parking module ,same problem.

Replace with genuine mercedes sensor and problem solved.
Hope this help.

 

Any joy with getting to the bottom of this? Having this issue myself and it's driving me rather nuts. Tried a new parking sensor module as per garages advice however no change.

Recently they have stopped working completely, whereas previously they worked for the first 10-15 miles now it's absolutely nothing..

 

Perhaps this can be a good dress-rehearsal for when the hard studf comes knocking.

-- Get a LAUNCH scanner or equivalent to diagnose what part got wet in your circuit.

-- Other possible ways are to hire you local intelligent specialist or replace wet sensors and oxidized harnesses.

Countless opportunities to be wrong without a scanner.

​​​Any option valid

 

Having same issues on my gls550. Does anyone have a solid solution ? No error message. Only way to know if with xentry code reader

 

The time to diagnose the parktronic can be spent much better. The whole system usually turns off at the slightest failure to protect itself. Good luck troubleshooting 6 harnessess and 54 separate sensors.

Star can show you detailed distance readings for every separate sensor in the system, even if it seems "off" looking at the car's dashboard.

I'd find a local guy with a Star diagnostics machine and agree on some reasonable fee for what is a very simple check.