C200 Kompressor - flat battery

[Intrigued]

My parents' 2004 Mercedes C200 Kompressor has a completely flat battery with no voltage whatsoever and it has been like that for a month or so whilst they have been away overseas. With the winter weather now really upon us, should I worry about trying to jump start the car to turn the engine over or can I just leave it in the drive until my parents return in the New Year?

I was planning to jump start the car using one of those portable battery starters/compressors you can buy in Halfords. However, I am worried that if I do jump start the car, then the car's electronics might go mad - for example, I'm worried the alarm might go off (I have the remote fob keys - so I assume I can turn it off) or the car might immobilse itself and refuse to be 'un-immobilised' (is there such a word?).

Am I worrying unduly? Can anyone advise me on what to expect? Strangely enough, having looked at the 500 page plus owners manual, there is no mention of what issues might arise should the battery go flat for an extended period.

Grateful for any help you might be able to offer!!!l

 

[television]

OK what you do is to take off one lead from the battery and use a charger of at least 6amp (otherwise you may not get it to start charging) and charge it.
you do not have to reconnect until your parents come home. when you are ready to re connect you will need the radio code. the rest of the car should re set, if it does not the first time take off battery lead for 5 mins and try agaian. any problems please ask

Malcolm

You must charge as soon as possible as batteries do not like being left in a uncharged state

 

[tom7035]

Jump starting.

Sound advice from Malcolm, but if you do have to jump start using a remote 12V power source for any reason, the procedure is as follows;

Make sure all electrics are switched off. Connect the positive terminals of the batteries. Connect one end of negative to donor battery/power source and the other end to a suitable earth on the car (NOT the battery) - one of the boot/tailgate lock mounting bolts is ideal. Start the engine and run at idle speed, then switch ON all your electrics, lights, r/w demister, heater blower, before disconnecting the batteries in the reverse order of connection. Turn off electrics.

 

[Intrigued]

Thanks for your helpful replies. One last question, if the battery is as dead as a dodo (I have a feeling it might be), is it still possible to jump start the car in this state?

P.S. I have just seen a copy of a Mercedes main dealer service bill in the handbook - £400 for a 3000 mile run-in service? That is extortionate!

 

[television]

Thanks for your helpful replies. One last question, if the battery is as dead as a dodo (I have a feeling it might be), is it still possible to jump start the car in this state?

P.S. I have just seen a copy of a Mercedes main dealer service bill in the handbook - £400 for a 3000 mile run-in service? That is extortionate!

Tom 7035 post tells you how to do that. the battery may not be as flat as you think, nothing much works below 11volt

Malcolm

 

[philharve]

Hi All

I had the battery in my C230K replaced recently and my car was without a battery for approximatley 5 minutes during the swap. The Indie checked the car over to see if everything electrical worked as before. The clock needed resetting as did the window winder electrics. In the latter case the Indie's fingers moved over the window winder controls like a pianist's fingers over a keyboard. He did it so quickly I couldn't make a mental note of the sequence. It worked though. The car radio settings survived the swap.

This experience lead me to wondering how many systems in a typical MB can be manually reset by deftly hitting the correct sequence of controls? There's nothing in my Haynes manual about resetting sequences for window winders, or anything else for that matter.

I've read in other threads that disconnecting the battery can sometimes lead to problems with the electrics but if this does happen how is the average MB owner expected to cope without knowing the reset sequences?

Does any member know if there is there a website someplace that lists what to do when these systems fail to work as expected following (say) a battery disconnection?

REGARDS Phil