Transmission and CEL ???s
Thread Starter
Junior Member
Joined: Nov 2007
Posts: 38
Likes: 0
From: Cleveland Ohio
2003 Clk 500
Transmission and CEL ???s
Hi guys, I have a few questions here.
I have a 2003 clk500 with about 58k miles on it. I have developed a slow tranny leak from the pan that has been leaking for a few weeks now and my plan was to just change the filter and put a new gasket and fluid in it anyway. Just yesterday my check engine light came on. Now if this would have happened on the hondas and nissans I have owned before I would know it is usually an emissions prob since that is most commonly what CELs are for. But this being a mercedes I was not sure if it could be related to my trans or anything else. So now that I have prefaced my situation here are my questions. Hope you can help.
1. Does the Mercedes dash have a diagnostic in it that will tell me the code and problem without a machine. Or do i have to go to autozone and have them pull a code. Where does it plug in?
2 I have 2 fluid tubes against the firewall and I need to know which one is oil and which one is for tranny fluid. I have seen the posts on here and the pictures seem like they are both pointing at the same tube. They both have black caps on them, but there is one that is easily accessable and there is one that can not be reached unless I remove the air filter box. The cap that is harder tp reach is black with a red button looking thing on it. Which is engine oil and which is tranny fluid.
Thanks
I have a 2003 clk500 with about 58k miles on it. I have developed a slow tranny leak from the pan that has been leaking for a few weeks now and my plan was to just change the filter and put a new gasket and fluid in it anyway. Just yesterday my check engine light came on. Now if this would have happened on the hondas and nissans I have owned before I would know it is usually an emissions prob since that is most commonly what CELs are for. But this being a mercedes I was not sure if it could be related to my trans or anything else. So now that I have prefaced my situation here are my questions. Hope you can help.
1. Does the Mercedes dash have a diagnostic in it that will tell me the code and problem without a machine. Or do i have to go to autozone and have them pull a code. Where does it plug in?
2 I have 2 fluid tubes against the firewall and I need to know which one is oil and which one is for tranny fluid. I have seen the posts on here and the pictures seem like they are both pointing at the same tube. They both have black caps on them, but there is one that is easily accessable and there is one that can not be reached unless I remove the air filter box. The cap that is harder tp reach is black with a red button looking thing on it. Which is engine oil and which is tranny fluid.
Thanks
MBWorld Fanatic!
Joined: Nov 2001
Posts: 3,860
Likes: 3
From: Jacksonville Florida
209/W210 Estate /W211 modded by MBENZNL
Inspect the electrical connection at the pass side of the transmission
Mb has updated the seal several times..Its a known problem
The leak and WILL cause a LOT damage to the TCU as the leak will continue pass the connection and into the Trans Control unit
One must have a OBD2 code reader or Star Diag to read out any codes/Faults
The car will not have a code for low trans fluid..
The Trans dip stick tube is the hidden one...
You Will need the workshop tool (dip Stick) to check the fluid level as the car does not have the dip stick
Mb has updated the seal several times..Its a known problem
The leak and WILL cause a LOT damage to the TCU as the leak will continue pass the connection and into the Trans Control unit
One must have a OBD2 code reader or Star Diag to read out any codes/Faults
The car will not have a code for low trans fluid..
The Trans dip stick tube is the hidden one...
You Will need the workshop tool (dip Stick) to check the fluid level as the car does not have the dip stick
Thread Starter
Junior Member
Joined: Nov 2007
Posts: 38
Likes: 0
From: Cleveland Ohio
2003 Clk 500
Thanks for the speedy post. I did check th leak on a lift and it is coming from the gasket on the drivers side. How does that cap come off. I tried pulling and it seems like there is some special way to pull it.
I went to auto zone and had them pull the code and the obd II pulled P0400. Any ideas? He said for a domestic it could be the egr valve or egr pressure sensor is bad. That is domestic. Has anyone had this code on their mercedes?
I went to auto zone and had them pull the code and the obd II pulled P0400. Any ideas? He said for a domestic it could be the egr valve or egr pressure sensor is bad. That is domestic. Has anyone had this code on their mercedes?
MBWorld Fanatic!
Joined: Nov 2001
Posts: 3,860
Likes: 3
From: Jacksonville Florida
209/W210 Estate /W211 modded by MBENZNL
The Transmission dip stick cap has a tamper proof lock on it ..to remove knock the plastic pin out..then replace the dip stick tube cap
PO400 is EGR test the valve first then inspect the tubes to it as they plug up
also the rubber/plastic lines crack and leak causing a code as well
PO400 is EGR test the valve first then inspect the tubes to it as they plug up
also the rubber/plastic lines crack and leak causing a code as well
