Pagoda SL Group

W113 Pagoda SL Group => Electrical and Instruments => Topic started by: Hawaii on January 20, 2010, 21:37:14

Title: Coil for 71 280SL
Post by: Hawaii on January 20, 2010, 21:37:14

I have a 1971 280SL with the original coil.  I want to replace the coil before it fails.  The original part number stamped by Bosch on the bottom is 0.221.102.050.  It has a reddish brown top with the numbers 1 (neg)  and 15 (pos)  on the terminals.   I have spent many hours trying to figure out the correct replacement for this coil.  No luck.  The forums have been generally helpful but I really could use the help of the members in figuring this out.  Your assistance will be greatly appreciated.

Andy
1971 280SL

Title: Re: Coil for 71 280SL
Post by: Naj ✝︎ on January 21, 2010, 08:48:46

Your present coil should have a blue housing.

The replacement will be aluminum housing with yellow labels.
Bosch # 0 221 122 001 (MB 000 158 2803)

details also in the wiki:

http://www.sl113.org/wiki/Electrical/IgnitionCoil

naj

Title: Re: Coil for 71 280SL
Post by: RickM on January 21, 2010, 15:14:54

Current Bosch DB shows Bosch Part #00027 or #0221122010


(http://i609.photobucket.com/albums/tt180/RickMNJ/Bosch.jpg)


(http://i609.photobucket.com/albums/tt180/RickMNJ/BoschCoil.jpg)

Title: Re: Coil for 71 280SL
Post by: Naj ✝︎ on January 21, 2010, 19:38:18

Rick,

That Bosch # should finish in 001

naj

Title: Re: Coil for 71 280SL
Post by: RickM on January 21, 2010, 22:09:27

Naj,

Do you happen to know what the difference is between the two? Every Bosch document I pull up references the 010 part #.

Title: Re: Coil for 71 280SL
Post by: Naj ✝︎ on January 22, 2010, 09:21:25

Hi, Rick,

It seems 010 is an earlier Bosch #.

Bosch do not list it anymore as a current number but other manufacturers (like Beru and Bremi) offer the same coil for both numbers, so I guess both are correct if 010 (NOS ?) is still available.

naj

Title: Re: Coil for 71 280SL
Post by: RickM on January 22, 2010, 15:53:24

Naj,

From what I see I'll bet you're right. I might place a call to Bosch tech support just for fun.

Title: Re: Coil for 71 280SL
Post by: Hawaii on January 22, 2010, 16:43:51

Rick:

Thanks to you and Naj for all the help.  Let me know what the Bosch people tell you; I need to go down to my parts guy today to buy a coil so I can get my car up and running tmrw.

Thanks, 

Andy

Title: Re: Coil for 71 280SL
Post by: RickM on January 22, 2010, 17:36:15

OK, I just got off the phone with a Bosch tech who checked the current DB in Germany.
The 010 coil has been superseded back to 001.

He mentioned that the coils are interchangeable but that the current listing shows the 001 number as being correct.

So, as Naj suggested, that's what you should go for.....and me, when ready  :)

(It always pays to double and triple check!)

Title: Re: Coil for 71 280SL
Post by: ja17 on February 14, 2010, 01:48:31

Hello,

What ballast reisistor is recommended for this 001 coil?

Title: Re: Coil for 71 280SL
Post by: Naj ✝︎ on February 14, 2010, 11:27:52

Hi, Joe,

001 is a replacement for the 'blue coil' for transistorised ign systems.
Two ballast resistors are used AFAIK.

0.4 (blue band) and 0.6 (silver band)

naj