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Please help asap

700 views 4 replies 2 participants last post by  BrightonPanto 
#1 ·
No idea where to post so have put this in newbies already
Hi guys I have a Mercedes C270 Cdi RHD
Based in Brighton Uk. It's a 2002 Auto car and I have
Just brought it .
I purchased the car with a known front SAM module fault
And was told disconnect the earth/Negative lead
Overnight so the battery doesn't drain
The main faults from the SAM being no ESP
no central locking but car was driving and starting fine .
However I started car last night and after a few minutes
It just died and comes up with the limp mode
Warning triangle in yellow and DSR warning in red
There is a very faint constant beep from the front SAM
right hand side centre engine ish... Module
The car cranks and turns very strongly but doesn't start
any ideas I noticed where the previous owner has been removing
The earth connector from battery daily it's a bit
Frayed so am having this recut and clamped
I also noticed fuse 52 not been upped from 15amp to
20amp so will replace it any ideas on what the low pitched
Whistle noise from CENTRE FRONT SAM means presume it's a
Warning ??
And any solutions ???
I also wanted to find out where the main earth
Is under engine on gearbox ??
All advice welcome .
 
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#3 ·
That is definitely the ABS Pump in the photo Panto. I'd take it to an Auto Sparky myself. Disconnecting the Earth every day can't be doing anyone or anything any favors.

Someone will point you in the right direction regarding where the Main Earth is located. I have a feeling it is behind the dash/glovebox (??)

Good Luck, electrical gremlins are usually hard to find but easy to fix.

Hutcho
 
#4 ·
Thanks Hutcho
Ive replaced the abs module easy to do
I'm going to recheck all the Sam
Module conectors hopefully tomorrow Tuesday
I had the ECU disconnect for a
Good while and reluctant to put it back
As very corroded around the pins
Have ordered exact replacement used
One then will get diagnostic star specialist
To put in all the programming also going to get a new battery this week as May as well .
I certainly agree keep taking off earth is not good but the previous owner had been using car that way for months
Will keep thread posted hope to have Monty fired up and running reprogrammed by Thursday
 
#5 ·
Hi guys so i have replaced front SAM
THE car ignition goes on lights on turn the key and nothing car also has brand new bosch S4 013 battery
had a snap on diagnostics read and it could not connect with the ecu called out the aa and same problem
battery was disconnected for a couple of days and also the ecu
do the ecu need and key need to be reset memorized i habe a specialist who can do this but cost is not cheap so far cost zero
the sam module was a straight unplug replug swap over but like i say intook ecu out as well
i removed all tje window trim to make it easy to remove SAM i have a replacement ecu that will need programing as old one looked very xorroded

ADVICE PLEASE GUYS
 
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