Mercedes-Benz Forum banner

1 - 9 of 9 Posts

·
Registered
1981 300 sd turbo
Joined
·
15 Posts
Discussion Starter #1
i know that this might sound like a stupid question, but i have to ask my 81 300sd needs a battery the old one on it has 820 crank amps, if i try to put a battery with 520 crank amps will the car still start or do it need the 820 crank amps to start the car any infor would be helpful newbie here[?]
 

·
Registered
1991 300 SE
Joined
·
18,534 Posts
No, in fact you should have an 850 CCA battery. You need a good burn from the glow plugs and the starter needs a good spin to get the diesel running.
 

·
Registered
1981 300 sd turbo
Joined
·
15 Posts
Discussion Starter #3
so i need a 850 cca battery to get the glowplugs going and the starter turning please advise.[?]
 

·
Registered
1991 300 SE
Joined
·
18,534 Posts
The battery needs some reserve from the glow plug burn – I don’t remember what the amps are off hand and then the engine needs to turn fast enough to start compression ignition, the starter needs enough juice for that – diesels need strong batteries.
 

·
Registered
1985 300sd
Joined
·
445 Posts
Yup!! Go with the most CCA you can find, it is worth it in the long run, trust me, I speak from experience!!!
 

·
Registered
1991 300 SE
Joined
·
18,534 Posts
I’d say that’s true for all 126s, considering all the power features and heavy-duty systems and components.
 
1 - 9 of 9 Posts
Top