[W126 Coupe] BOSCH in a BOX

[Mike R.]

I found a local rebuilder in Vegas that seems to be doing just fine 
rebuilding mine. But... I had two of his die because of something I did. I 
put in the dual electric fans in place of the engine driven viscous clutched 
fan (significant improvement in cooling, BTW). I didn't properly tighten the 
power connection in the MB connector front of the battery, on the engine 
side of the secondary firewall, and it came loose just a little. That 28-amp 
fan load was allowed to get intermittent, which spiked and drove the 
regulator to failure. Once I tightened it and put on a fresh alternator, all 
is well.

I mentioned all that to suggest that it might be a good idea to check your 
high current load wiring connections. Could be bad alternators, could be 
loose high current loads spiking the regulator. YMMV :-)

Later,
Mike R
----- Original Message ----- 
From: "Dick Spellman" <spell.yy at verizon.net>
To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
Sent: Monday, July 07, 2008 5:56 PM
Subject: [W126 Coupe] BOSCH in a BOX



>I just am compelled to report on this continuing fiasco once again.

>

> It may have been a year or so but, once again BOSCH in a Box Alternators 

> are crap!

>

> This one failed at 10k miles, I've reported on two previous failures and 

> their respective mileages.  All below 35k as I recall.

>

> This really puts a damper on zero-clocking these older MB's where the 

> replacement is not anywhere near as reliable as the original with 150 k or 

> better in every case.

>

> Lifetime warranty means nothing when this kind of failure is often 

> followed with a tow-truck, down-time on your travel and/or job, whatever 

> and really makes you think before doing any kind of regional travel.  I 

> typically run from Boston to DC and parts in between in the 300SE's.  This 

> time, I saw the crap indicators all lit up in my driveway so not so bad 

> but, I'm unpacking the Benz and renting a car as a result.

>

> A real turn-off where all of my set-ups are lost to me in a rental for 

> sound, laptop, pda, sat and nav not to mention the comfort and ride.

>

> Just another Bosch in a Box story.  Too bad there is no alternative 

> because I've had it with Bosch's bs remans.

>

> Dick