The obvious questions:

-Do you have an aftermarket radio and/or radio-amp or alarm system?

-Are the cables well connected to the new battery.

-Is the new battery good? Bad batteries are not uncommon. What brand is it and what rating?

You need to determine:

-Is your charging system charging properly? As simple as a loose belt or possibly the diodes and/or the alternator.

-Do you have an abnormal current draw when the car is shut off that is draining down the battery?

Nice car ... what color? "Sigh ...."

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)