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1987 420 SEL
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2,090 Posts
Discussion Starter #1
I'm going to be buying a new battery soon. Which is better? The Optima or Interstate? Which series? Any advice is greatly appreciated!!!
 

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86 420 sel,
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162 Posts
i use interstate mtp 93 & 91 in the shop. they last around 5-7 years. i got optima in my boat (3 blue tops), but then again it is sitting a lot, and we are playing loud at the lake parties. unless you have a huge stereo system, go w/ mtp-93.
i have a 400w system in mine w/ a mtp 93. works great
 

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Depends on the day!
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13,337 Posts
I've been slowly switching my car's to optima and have been Very pleased. When my SEL was hit it sat for 3 months and fired in the first couple of cranks.. I've noticed advance auto has a good price on their red tops...

Jonathan
 

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93 190E 2.6; 82 300 SD Turbo
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1,678 Posts
I have an interstate battery, dont recall the specs on it thou it was just replaced about 3 months ago it wasnt even that old maybe 12 months at the most. I have a 900watt amp connected up to 3 Infinity 12s (300w rms each) when i turn the system up at night my headlights dim each time the bass hits.
 

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Gertrûd - 1988 300SE
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194 Posts
I've owned several Optima batteries in my different cars, red yellow and blue tops alike. Blue is meant for Marine, Red top is standard, and Yellow top is a deep cycle. While working at my old stereo shop in Spokane, whenever we did any high-end systems ($5k-100k) we would always install at least one Optima battery. I've never ever had any problems with the Optimas, and I refuse to use anything else. Sadly enough, I currently have some POS battery from Batteries Plus in Gertrud, but will be switching it over to a yellow top before summer. I highly recommend the Optimas. They are more money, but it's like comparing our Mercedes to a Honda [:p] In the end, you get what you pay for.
 

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1988 560SEL sold:
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4,717 Posts
If I were to go with the Optima Red Top, which one should I install for my 560SEL? Optima's website notes that they do not have a compatible battery for my car when I perform the compatible battery search.
 

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84 300TD, 2005 CDI, 2006 CLS55
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1,041 Posts
If you have a large stereo you ought to change your alternator to a higher amp rated model. Having a "better" battery is not the answer- the battery just powers what ever the alternator cannot due to demand, and if you demand more on a consistant basis, the only real answer is to supply more... which means a alt with a higher rating than the 65 amp stock unit. Bosch makes a 115 amp rated model which fits with minor adjustments that is found in Saab's in junkyards. due a search on "115 amp" and you'll see what I mean.
 

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w126 420 sel
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622 Posts
interstate battery is what the 420 has. very good battery so far. the most it sat was for 3 weeks and started up great. just make sure you get the correct make for our model. spekaing of batteries, i remember the the 420sel had a mbz battery and it was pain casue i think it was one of those batteries you have to maintain with water every now and then. i gues those days are done with.
 
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