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Old 06-29-2001, 04:41 PM
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"brand new" owner of 1986 300 SDL. Need good independent mechanic to put me on the proper maintenance schedule and fix a few "little" things:
1. vaccuum leak causing run-on after key turned off
2. rear window inoperable - after removal of door panel discovered broken plastic thingie connecting mechanical arm to bottom of window
3. clock
4. proper maintenance schedule
5. tune up, is it the same as for a gas engine? what should I ask/look for?
6. what does 300 SDL mean? what is "126"?
Any suggestions would be appreciated.
Thanks in advance.
Curtis A.
by the way, if anyone has an Allante, there is a great board at
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Old 06-29-2001, 11:26 PM
Registered User
Join Date: Nov 2000
Location: St. Petersburg, FL
Posts: 200

I live in Potomac and have a 1982 300SD. Some of your problems are reminiscent of mine.

1. Vacuum leak causing runon - I replaced the vacuum pump (fairly easy DIY job) and the problem went away. I did check the lines, etc., and didn't see anything else. Since the car has over 200,000 on it, I'm erring on the side of replacing parts instead of spending huge amounts of investigative time.
2. "Plastic thingie" on door - I had that problem with my right rear and did the job myself. It WAS a bit of a job, but those are the ones that save you the most money as a DIY.

I would buy the 126 CD from MercedesShop and review the basics there.

On a mechanic, the best I can suggest is Potomac, Cherner Classic Cars, who is now doing Mercedes work. I had them work on my Packard (another story...) and they did good work at a reasonable price. I've seen a number of later model Mercedes there, as well. They are right on the corner of Falls Rd. and River Road. Lots of nice looking classics parked out front. I don't have any other mechanical experience in Potomac.

Good luck.

- Ted
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Old 06-30-2001, 12:07 AM
Mike Murrell's Avatar
Registered User
Join Date: Feb 2000
Posts: 2,141
How far are you from Timonium, Md?

Check out ->

If you're not in this vicinity, perhaps Roy could refer you to someone in your area.
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC

James Madison - Oppressors can tyrannize only when they achieve a standing army, an enslaved press, and a disarmed populace.

Liberty Firearms Training - After years of trying to regulate California criminals with a never ending stream of gun control laws they have still not given up with the belief that if they make something a crime that criminals will miraculously start obeying the law.
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Old 06-30-2001, 03:48 PM
MB Shop Retiree
Join Date: Sep 1999
Location: Hockessin, DE
Posts: 1,047

They are very good, and actually have a division that races 190Es as well. Try them.
Chirag (Charlie) Patel
- 03 Mercedes S600 Sport TTV12
- 97 Acura NSX-T
- 99 BMW E36 M3 w/500+ HP
- 04 Lexus RX330
- 04 Dodge Dakota Quad 4x4 V8

4 Sale:
- 99 BMW M3 E36 Coup with Dinan SC, Upgraded to an RMS Stage 3 with Aftercooler, 12psi, and 500+hp @ flywheel.
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