75Amp v 125Amp Battery?

1 reply [Last post]
Wed, 05/12/2007 - 15:47
daley
daley's picture
Offline
Joined: 19.04.2006
Location: Yorks

Hiya, my Merc 125amp battery has gone duff. Will I be able to run on a 75amp OEM? 125amp seems a little excessive for a car with no winch, A/C etc, and I don't want to pay Merc prices? Thanks, Daley

Top
Wed, 05/12/2007 - 17:19
#1
mgrays
mgrays's picture
Offline
Joined: 08.11.2005
Location: Aberdeen Scotland
GWOA Groups: Members
Re: 75Amp v 125Amp Battery?

Yes is answer... lots here skimp on it with no issues.. go look at the Merc cars with the same engine; see my notes below;

Battery.
1988 300GD owners book lists 88Ah battery. Motor factors list replacement as 125Ah large square brick (286x269x210mm 230OAH). This is made by Bosch? (£200 inc Vat 2006) Exide (£168 inc Vat 2006), Varta HGV Commercial 625-023-000-3100 (£147+Vat 2006) The Varta one has terminals at opposite corners which is no doubt right.
All other Mercs except ML270 (100AH) have less than 88AH eg E300TD at 72AH.
Smaller G have 66Ah batteries.
Really 125Ah is overkill unless you are winching or running fridges! 66Ah is enough and only about £70 for Bosch or £45 for cheap generic battery.
My 300D was fitted with 66Ah Bosch = 566 101 064 now replaced by 575 121 072. This is a generic “096” UK battery dims of 278x175x175mm. This has positive on right when terminals are to front of car and you are standing in front of car. It fits and works.. battery clamp could be better but works.
Max size you could get into tray = 275x275x210mm
Battery is used in NATO vehicles and is a DIN 6TN

Top