Water leak and extended activity module issues
i am the recent owner of a 2002 ML55 and I’ve been having a few issues with water leakage and angry electronics. Every time it rains, I have water sitting in the passenger side floor mat. Was simply wondering if anyone else has had this issue and how to fix it.
Secondly, and it may be connected to the water leak the instrument cluster displays the esp and bas, ets, airbag off, srs, and parking brake light while driving. Sometimes the lights will turn off and I can test that the parking brake sensor is working properly. So it has moments of the angry electrical where the lights are on, and the moments of working properly. I pulled the codes for the all activity module with no fault codes being read and the codes for the extended activity module with a bad can bus connection for the instrument cluster and trip computer. I’ve tried looking for where the eam is located with no luck.
any help is appreciated

So pretty



I have been researching this issue for some time, and it seems, the drain pipes from the roof (they usually open in the sunroof cutout and run down the A and C pillars down behind the wheel wells....are clogged, most likely on all 4 sides...front and rear, left and right...
I unfortunately, have a lamella sky view roof that stopped working few years ago...so I am not daring to open it...I am now looking for a sunroof specialist shop to deal with this.
The roof drains all need to be checked and cleaned on all 15+ year old MLs...it seems..they are all suffering from this problem.
If anyone has found a solution, please share...
i am the recent owner of a 2002 ML55 and I’ve been having a few issues with water leakage and angry electronics. Every time it rains, I have water sitting in the passenger side floor mat. Was simply wondering if anyone else has had this issue and how to fix it.
Secondly, and it may be connected to the water leak the instrument cluster displays the esp and bas, ets, airbag off, srs, and parking brake light while driving. Sometimes the lights will turn off and I can test that the parking brake sensor is working properly. So it has moments of the angry electrical where the lights are on, and the moments of working properly. I pulled the codes for the all activity module with no fault codes being read and the codes for the extended activity module with a bad can bus connection for the instrument cluster and trip computer. I’ve tried looking for where the eam is located with no luck.
any help is appreciated

So pretty
I have a 2002 ML500 with the same problem. Water on the floor on the passenger side.
If you havent figure it out yet, pull down the headiner at the passenger corner where it meet the A-pillar. There is a sunroof drain and hose. My hose had disconnected from the drain. I simply reconnected it and ziptied it to cinch it down a little to make it stay. I also blew air through it clear any obstruction.

I have been researching this issue for some time, and it seems, the drain pipes from the roof (they usually open in the sunroof cutout and run down the A and C pillars down behind the wheel wells....are clogged, most likely on all 4 sides...front and rear, left and right...
I unfortunately, have a lamella sky view roof that stopped working few years ago...so I am not daring to open it...I am now looking for a sunroof specialist shop to deal with this.
The roof drains all need to be checked and cleaned on all 15+ year old MLs...it seems..they are all suffering from this problem.
If anyone has found a solution, please share...
If you got this resolved (or not) I would love to hear about your experience.

I have a 2002 ML500 with the same problem. Water on the floor on the passenger side.
If you havent figure it out yet, pull down the headiner at the passenger corner where it meet the A-pillar. There is a sunroof drain and hose. My hose had disconnected from the drain. I simply reconnected it and ziptied it to cinch it down a little to make it stay. I also blew air through it clear any obstruction.


