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  #1  
Old 10-12-2006, 08:13 PM
Stevels's Avatar
Running Used Cooking Oil
 
Join Date: Nov 2005
Location: Providence, RI
Posts: 37
How do I remove the baterry from my 350 SDL?

Sure, this is a STUPID question. I am embarrassed to ask it.

I want to replace my OEM battery on my 1991 350SDL. It seems like the old battery is attached to the tray somehow. There are no obvious clamps or other obvious mechanism holding this batter in place, yet it seems fixed to the battery tray somehow. I did not want to force it.

Is it being held on to the tray just with gravity? Knowing MB, I would think not, but there are no visible indications of securing this

How do I remove this thing?

I need to get to work tomorrow and my new battery is sitting here in front of my feet. Worst of all, because of my apparent inability to even change a car battery, I am feeling very foolish in front of my wife right now

Thanks!

SA

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Providence, RI
Current Fleet:
1991 MB 350 SDL running 2 tank Frybrid Waste Vegetable Oil
2005 Toyota Prius
1997 40' Bluebird Wanderlodge motorhome running running world's first 3 tank Frybrid Waste Vegetable Oil

Last edited by Stevels; 10-12-2006 at 08:17 PM. Reason: mispelling in car model
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  #2  
Old 10-12-2006, 08:21 PM
waybomb's Avatar
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Join Date: Nov 2002
Location: St. Joe, MI; Manitowoc, WI
Posts: 1,553
On my sd, there's a bolt holding a bracket down on the long side of the battery at the base of the battery.
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2001 E430 Sport, 204,000 miles
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1991 300SL, 189,000 miles
1987 420SEL, 149,000 miles
1986 190e 2.3 16v, 151,000
1968 W30 442, 78,000 miles
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  #3  
Old 10-12-2006, 08:29 PM
Stevels's Avatar
Running Used Cooking Oil
 
Join Date: Nov 2005
Location: Providence, RI
Posts: 37
Is it obvious? There is nothing going over the battery and I think the only way may be being secured -- if it is being secured at all -- would be with a tray that holds it down from the base of the battery. Is this something MB ever did with their battys?

Thanks!
__________________
Providence, RI
Current Fleet:
1991 MB 350 SDL running 2 tank Frybrid Waste Vegetable Oil
2005 Toyota Prius
1997 40' Bluebird Wanderlodge motorhome running running world's first 3 tank Frybrid Waste Vegetable Oil
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  #4  
Old 10-12-2006, 10:08 PM
Hatterasguy's Avatar
Zero
 
Join Date: Nov 2002
Location: Milford, CT
Posts: 19,306
Lift up washer fluid tank. There are two brackets at the base of the battery in the front, with I think 10mm nuts on them. Remove and it will pop right out.
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  #5  
Old 10-12-2006, 10:39 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,793
With the brackets out, slide the battery forward then lift.

Sixto
93 300SD
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  #6  
Old 10-13-2006, 01:06 AM
wbain5280's Avatar
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Join Date: May 2001
Location: Northern Va.
Posts: 3,386
If the battery is a smaller one, there may also be a clamp at one side bolted to the tray.

Don't forget to remove the negative cable first.

When you do get the battery out, look at the battery tray. If it's got some surface rust, take it out and clean it. There are two bolts on the firewall, one on the left front corner and one that's on a bracket on the front right corner. Once out, look for any debris under the tray because leaves and other junk can collect there. A good shop vac will take care of that stuff. I took a battery tray out of a 380SEL in a junkyard and there was a huge amount of junk under it.

If the tray is rusted really badly, lots of holes, consider replacing it. Junkyards are good.

Use baking soda and water to clean the tray, and the area under the tray, of battery acid. Then prime the tray with Rustoleum, or a similar paint, then spray paint it black.

Use a terminal cleaner to clean the clamps.

Use the shop vac to clean out any other junk between the firewalls. Check your heater hoses in the inter-firewall area too.
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  #7  
Old 10-13-2006, 12:34 PM
Stevels's Avatar
Running Used Cooking Oil
 
Join Date: Nov 2005
Location: Providence, RI
Posts: 37
Thanks

Thanks guys! I will check it out now.

You guys ROCK!

__________________
Providence, RI
Current Fleet:
1991 MB 350 SDL running 2 tank Frybrid Waste Vegetable Oil
2005 Toyota Prius
1997 40' Bluebird Wanderlodge motorhome running running world's first 3 tank Frybrid Waste Vegetable Oil
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