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Sagging rear end on 1986 300SDL ??

I realize that rear ends tend to sag with age, but there are relatively simple operations for that problem. With my 300SDL, it seems to be a more difficult problem. I continue to sag even after replacing my differential mount and having OK shocks on the back (i didn't change them, but they only bounce once after compression.) Should i replace them anyway (they probably have not been replaced in a while)? or are there other common wear parts that i have neglected to replace? I would really like to see tops of my rear tires.....Thanks for the help.

Scott

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1985 300SD Burglar Alarm problem

How do I disconnect, turn off, or otherwise disable the burglar alarm in my 1985 300SD ? I had to go through deep water (8"+) at slow speed. Shortly thereafter, when I turn on the lights at all, the burglar alarm goes off and lights flash. This is embarrassing, at the least, to drive at night, so presently I have just parked it in the garage until I can solve it. I tried the driver door key lock/unlock - no difference. After setting over a week in my garage to dry out completely - no difference. I live in rural N.W. Indiana and there is really no need for the burglar alarm.

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1983 300SD won't keep running

OK.I had an injector return line leaking,replaced it...drove around the neighborhood for few minutes and then went back to the house thinking everything is OK but then when I put it in reverse it cut off.Did the same thing twice more...though there was some more air in the system...bled the injectors and primed the hand pump...btw I just instaled the new upgrade pump...since U don't have to screw it does it have to be all the way down?I pumped until it got tight but it's not all the way down...now the car won't even go forward...it crankes up fine (running a little rough) but when I put it

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