battery size for 400i ?

measure the space available to go for the biggest one to fit the space, it´s easy

 

Do you have one of the gear reduction starters?

 

The 400carb. allows ample space for a 30cm 17cm 22cm (wide/depth/height) which means approx 100Ah -pending model/type of battery.

Anyway -a fresh battery is not expensive, and never wrong !

 

I have one in both of mine- Even with the battery almost flat the car turns over- Great investment...

 

Don't mean to give you more work, but (properly working) K/KE-Jet should not have any trouble starting cold or warm (and without touching the throttle). Does your difficult-to-start condition occur when cold, warm, or both?

 

A well charged stock sized battery in good condition should be all that you need to start the car if all of the other systems are working properly.

Last weekend my 400i started right up after being dormant since mid-December.

You may well need a new battery, and they are cheap, but it sounds as though there are other issues that you will need to address as well in order to get the easy starting that this car is capable of.

 

Battery minders are also a great investment especially if you have multiple cars in your garage.

 

Hi,

I've just changed the battery on mine. The handbook says 84ah, but its really the starting amps that matter. (having said that you need the right ah for the alternator charging) Some 100ah batterys can have a low start amp (say 600a) whereas some 60ah batteries may have 640a starting current.
After a bit of searching I found a Bosch battery with 85ah and 800a starting...perfect!

PS The 400i reduction starter...where can I get one?

Regards
D

 

From British Starters:

http://stores.ebay.com/British-Starters?_trksid=p4340.l2563

I have one in my 400 and it has made an incredible difference.

Aidan

 

I have an Interstate Battery in my 400,, type MTP-91. works just fine with the stock starter.. its the same identical battery as in my 550.

Robert

 

I use a battery that NAPA says is for a Mercedes. For starting issues do not look for the high amp hour batteries, look for high Cold Cranking Amps. I think mine is 850 CCA.

Of course getting the motor to start easily is best.
Ken

 

Group #74..perfect fit.

 

http://www.rtpnet.org/~teaa/bcigroup.html#note2

Currently, I have a Group 34 in mine:

Length is 10 1/4" & w/the battery shoved back towards the windshield as far as it will go, there looks to be about 3/4" space between the battery & the small steel angle on the forward side of the battery base pan.

Width of 6 13/16" fits precisely with respect to the battery hold down bracket @ the base. The windshield motor bracket is another obstacle to the overall width.

Height of 7 3/4" seems to be about the highest you can fit under the hood (throw a piece of 1" Styrofoam on top of the battery & shut the hood to find the ultimate height--I'd do this myself but mine is over 1000mi. away).

I'm planning on installing a Group 65 Duracell EHP series next week & it measures 11" long but the above chart shows 12 1/16", best to measure the battery before purchase.

 

I guess that mine is a group 34 as well, a NAPA Legends 75 with the model number 7534 and 690 CCA rating. No clearance issues.

Here are the specs from the NAPA website:

http://www.napaonline.com/Search/Detail.aspx?R=NBR7534_0240740649

Battery - NAPA Legend 75 Month
Product Line: NAPA Batteries - Regular

Part Number: BAT 7534

Price:

Availability: This part can only be purchased from your local NAPA Auto Parts store.

Features & Benefits Maintenance free under normal operating conditions; High tech construction designed to withstand temperature extremes; Premium reserve capacity; Poly handle on popular sizes
Features and Benefits PDF


Warranty 75 Months/18 Months Free Replacement
Warranty PDF


Attributes Battery Application : Automotive
Battery BCI # : 34
Battery CA @ 32 Degrees F : 875
Battery CCA @ 0 Degrees F : 700
Battery Height : 7 7/8"
Battery Length : 10 1/4"
Battery Load Test Amps : 350
Battery Posts Type : Top Mount
Battery Reserve Capacity : 120
Battery Voltage : 12
Battery Weight : 37.9
Battery Width : 6 13/16"
Measuring State of Charge : Batteries below 12.4v (6.2v for 6 volt batteries) must be recharged before an accurate load test can be performed.
Physical Inspection : Terminal Inspection: Broken or loose due to abuse, burn marks from shorting, damage from fire, explosion or collision.
Safety Precautions : Batteries expel explosive gases. Keep sparks, flames, burning cigarettes or other ignition sources away at all times. Always wear safety goggles and face shield when working near batteries. Do not leave a battery on charge for more than 48 hours.
Wet or Dry : Wet