Hi all,
Can anyone helpme, I own a 94 e280 estate andout of the blu it started getting sluggish starting. Usually it sounds dead and then the battery slowly spins faster and faster till it starts. OK here s a clue . On the first day this happened when i got it started the alarm light to say its on stayed on throu the whole journey. Now the alarm and keyfob central lock system has packed up altogether. I suspect the faulty alarm is draining the battery. oh , also when i measure across the battery when running i get 14v - is this a bit low??

Where is the alarm housed on this car iv looked but cant find so i can disconnect and eliminate this from the fault search

 

clean the battery terminals also.

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mmm.. sounds like a bad connection between starter and battery or your battery may just need replacing, a charging voltage of 14v is fine. disconnect battery negative and with all consumers switched off measure the current draw. should after a few minutes settle to below 100ma.