Hello, this is a pretty complicated system to say the least. There are alot of fault codes here, but many of them point to some of the same modules. I was able to find a couple of them, These have to do with the radar, display and Park assist systems. To start with the A86 is one of the rear radar sensors in the bumper. Which there look to be about 4 in just the bumper itself. Ill post a picture of its location when I get all these diagrams straighten out. There is also a Software Update for the Pak Assist system which does include the A86/2b2 right inner radar sensor, rear bumper. I believe the MIL on and Stored is there because that system has been disabled due to the fault. Whereas the other just Stored codes may not disable an entire system, but are still faults. You mentioned you found connectors unplugged? Or just appear to have been tampered with?
Also I found a module on the CAN Bus network labelled TPM, but have not found any information on it just yet. The network on this vehicle is huge and there are more modules than I have ever seen on one vehicle. Im assuming the component N88 is part of or is that TPM.RDK module. Having a supply voltage too high code will have to be looked into further to see if it is just a 12volt supply or if theres some Reference voltage it should be at. I will post all the diagrams and information I can, Obviously there is a CAN bus network fault happening here, so it could be one of these modules causing a fault on one of the networks. Alot of these modules are on different speed CAN bus networks as you will see by the diagrams.
So to start with, here is the location of A86 2b2 Radar sensor and the code 5605 is giving a connector or wiring fault. So I would check the connector here for loose Pin fitment or corrosion to begin with. I dont have all of Mercedes factory information, but we'll do the best we can here.
Are you able to detect all the modules in the vehicle or are there any that will not communicate?
Ok diagrams 6 to 10 are the TPM (Tire Pressure Monitor Module) location and wiring diagrams to check its power supply, It is a 12volt feed from Fuse 96 only 5amp. Check the Ground connection (Brown wire Pin8) also, there should only be 12 volts on the power wire (Red/White wire). This module is also on the CAN bus B network.
Images (Click to enlarge)
Tuesday, July 26th, 2022 AT 7:22 PM