battery question (NOT a post about "brands")

[richard28]

The mb oem battery in my 1999 clk320 died, and I had a one-year old battery I maintained with a trickle-charger, so I replaced the old one. I had no complaint on the oem mb unit, as it gave perfect service since Feb. 1999. The battery I installed is not the standard size for the clk; rather, it is the standard size for the w124. However, my clk does not have xenon lights or any other options with a big power drain and has run perfectly with the w124 battery. Should I bother replacing it with the larger size it came with? Thanks.

[S-Class Guru]

No problem, as long as it fits okay and starts the car okay.
Batteries are basically selected for the engine size and drag during startup, and of course for the space they need to fit into. A bigger bsattery with more cranking amps will turn an engine over longer before losing power, and crank longer in cold weather, but MB usually overkills and stuffs the biggest available in the car - which is a good theing, and why your OEM lasted so long. but, as long as the car cranks over and starts easily, it will never care what got it started. Winter starts may affect the smaller battery, but you'll know that in 6 months.

DG

[richard28]

Thanks DG.