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Battery problem W211
I am so furious right now
what is wrong with this car?! I going to the MB workshop monday morning. Does anyone here have a clue about what going on?
In the UK we have a TV series called One Foot in The Grave with Victor Meldrew, his favourite saying is, "I do not believe it" He always says this when things go wrong that should have been going right.I do not believe it...... Your problem is on the outside a clear example of a known problem with early 211's that was fixed by one of the many upgrades.
Your dealership is not inspiring confidence, but here in the UK, if the dealer cannot resolve the problem they then contact the Technical Department of Mercedes-Benz UK. They then advice the dealership on a course of action, if this fails to remedy the fault then they send a highly qualified engineer down who WILL repair it.
I note the mileage of the car and assume this fault has only recently started? I have asked a number of questions in my previous message that now appear more relevant, namely:
As a follow-up if the car was purchased second-hand do you know its full service history and has it been involved in any type of incident?
I am trying to get an idea of the history of your car because you are not being treated as I would expect\demand from a main dealer. Have you got any non standard accessories fitted? Tow-bar?
Are you parking near anything that might cause the discharge, or are you leaving something switched on?
I feel for you as this must be soul destroying.
By the way your English is perfect, more English in fact than mine, and I am English
Regards,
John
An overcast afternoon in Torquay
I would make them run a lot of tests before they actually replace anything this time.
Thanks I try my best
The problem started over 8 months ago and the millage then was about 140.000KM. I drive about 60-70.000KM a year due to my work, which covers most of the Scandinavian region. I bought the car from new and all services have been held at the same two MB workshops here in Copenhagen. The car has had no accidents except from a minor back bumper accident, which also was repaired by MB. Everything on the car is orginal, I had the small navi APS50 which later was replaced with the bigger command. A lot of things have been replaced under warranty including the SBC, turbocharger, entire gearbox, the first navi, steering system and all sorts of other mechanical and electrical components.
I must admit the Mercedes people have been helpful on serveral occasions and like jimbo1mcm stated, I too think that they are more keen to replace parts than to find out whats causing the problem. This is perhaps because its less time consuming. The MB workshop that I use, is not just a small certified MB partner but actually the biggest Mercedes-Benz (owned by DaimlerChrysler) workshop in Denmark. They assure me that they have the best skilled staff..
The car is usually parked outside on a quiet road, nothing is left on. I even switch off the climate panel and command before leaving the car. The battery problem happens occasionally, which also makes it difficult for the MB people to locate the problem and take new action everytime.
Last edited by AR.Shah; Mar 11, 2006 at 11:28 AM.

HE's got 202,000KM on his CDI... and I'll bet it's still running like the day it was new!
There was a Brit that posted on the Diesel forum that he had 260,000 miles on his 320CDI in 3 years I recall, and his only problem was his transmission went out at 120K... which is probably due to the stupid "no fluid" change idea.. I for one will change mine every 26000 miles or 2 years..
Tell us how your 220CDI is running otherwise AR.Shah?
Last edited by AR.Shah; Mar 11, 2006 at 11:44 AM.
The Best of Mercedes & AMG
John
Good memory Sam.... Just to set the record straight my SA said recall preformed on the car while in for service about 10 days prior to the malfuntion was the culprit. He stated my car is the third one he has seen this happen to after the recall was performed. No answers to how or why, but the car has been back in service for over 6 months with no problems. The paperwork states the official cause was an electrical fault with the BCM ??? and the recall performed was the battery control unit reprogram recall #2005060008... SA states this "reprogram" caused my malfuntion. I feel I have to believe him as we have never had a problem with the car untill the reprogram (recall) and have not since....
AR.Shah, Sorry to hear of your problem. Perhaps a recent recall is causing your problems simular to mine??? Perhaps the installation of the Comand system in your car is the reason for the battery drain??? Good luck.
)I hope I am not seen as criticising one of the sponsors of this excellent forum
because that is not what I intend. I am merely clutching at straws over what is causing your frustrating problem. John
I do think it needs some charge in the consumer battery to start , but, given that when you leave the car off, it sounds like both batteries are draining - it could be a BCM problem - either with the BCM, or with the big relay on the BCM that disconnects/connects the 2 batteries together keeping them connected together and draining the battery.
My brain is a bit rusty when it comes to batteries, but I have a feeling that if you leave a big battery and a small battery connected together that are in different stages of life they dont discharge in the way you expect - which is why you're always meant to put a whole set of new batteries in a radio/toy etc
From what was mentioned above, the BCM software can be reprogrammed - I'd get the dealer to (a) with Star diagnosis check ensure that the BCM has the latest software in it (this is called 'flashing') and (b) check that the BCM relay is functioning (no idea how he'd do that)
The early W211 and R230's all got new bigger consumer batteries under a recall that wasnt publicised in Europe, just got done when you had the car serviced once. (friendly MB tech told me they were doing about 10 hours of work on early 211's)
Also, W211s with chassis number up to A530021 and X148458 have a problem with the LCP that drains battery (lower control panel).
Cheers
Richard
Thanks for your input
I will be taking the car to the workshop tomorrow and lets see then what they find out. The have tested the BCM and it shows that it has the most recent software, they have also changed this module previously. Its been 3 weeks since they put in a new "big battery" and almost a week since they put in the smaller battery. I will tell them about this relay on the BCM and the lower controle panel. Btw sorry for my ignorence but where exactly is this lower control panel placed? Best regards
Shah
I finally took the car to the workshop where the workshop staffmanager was a bit dissapointed to see me again, hoping that all problems were solved last time. I told him about the problem and again he seemed clueless about what was going on. After a while I told him about the relay which controls the battery controle module and he gladly nodded yes, that could be it!
He said lets have a go at this and if this doesnt solve the problem, then he would for some reason, once again like to send the car to the Bosch Autoelectrical workshop. We agreed and the relay was changed. I am crossing my fingers now and hoping this was the final visit to the workshop. I would once again like to thank everyone in this forum for their effort and time with ideas of what could be wrong.
Best regards
Shah
P.s I have enclosed pictures of this relay.
Tried with taking the radiator-cap off at night and the car started fine every morning! This has been a big leasson, a mechanical problem causing so much electronical fuss. Hope this information is useful to others in this forum

Top marks for solving the problem. The 220CDI is a tried and trusted engine which has been powering Mercedes for a good few years. Our Sprinter has the 220 130hp CDI engine.
You have been terribly unlucky and hopefully things will settle down and you will have many, many kilometres of happy motoring.
Regards,
John
Yes the coolant was leaking trough the head-gasket into the enginehead, it was a very small leak. The car used to use about 0.2 to 0.3liters of coolant a month. Also a slight grey smoke at startup in the morning. I thought this was normal but in fact it caused all this electronic fuss.
Gasket was removed and enginehead was grinded. No more malfunctions now
This was a very rare incident and MB techs have also learnt a lot from this.Regards
Shah




