Originally Posted by Ivanerrol

Many batteries that are put in for replacement are under sized. >>wasn't aware of that!<<

The battery for a later model W124 should be a minimum of 80AH preferable 100AH or in the new terminology over 620CCA. >>'ll look for the rating on the battery<<

I put a battery that fills up the entire battery tray into my W124.
The radio and alarm/remote opener drags a little current at all times. This was enough to flatten the previous battery over two weeks. (P.O. had fitted a 490cca Furd battery )