Someone who knows the '71 300 SEL - Mercedes-Benz Forum

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post #1 of 5 (permalink) Old 12-09-2004, 08:25 PM Thread Starter
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Someone who knows the '71 300 SEL

So my father's absolute favorite car is his '71 3.5 with air suspension. He's sunk more money into that car than he could've bought two new ones with.

It's nearing the death bed and he's struggling with what to do with it. Latest issue is a leaky air bag (suspension). His local MB guy (Atlanta) doesn't want to deal with the car any longer so I'm looking for someone who may have a reference for me: the MB wrench who adores and knows these older models like nobody, who can get ahold of it and rejuvinate it the right way.

I would greatly appreciate any info you folks might provide.


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post #2 of 5 (permalink) Old 12-10-2004, 09:42 PM
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Vehicle: 1965 220S, 1999 Volvo V70 (wagon), 2006 Ford Crown Vic Police Interceptor, 72 350SL 4 Speed
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RE: Someone who knows the '71 300 SEL

Your father needs to put money, time and effort into this car to keep it going. Please visit for mor info on these cars, despite it being M100 oriented. The chassis is the same only the engine is different. Scan the forum for know faults. Replacing an airbag is fairly easy.

Read this thread:


GVZ has a wealth of information on these cars, only the engine and drivetrain are different, much more heavy duty to handle the extra HP and torque.

What about it is nearing it's death bed?

Near Manassas Va. '65 220S, 2006 Ford Crown Victoria Police Interceptor, '99 Volvo V70, '72 350SL 4 speed

Not part of the in-crowd since 1952. It's BRAKES not breaks. You break a bone, use brakes to stop your car. /rant
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post #3 of 5 (permalink) Old 12-12-2004, 04:25 PM Thread Starter
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RE: Someone who knows the '71 300 SEL

The death bed part- I guess just that it's like an old old man who keeps having problems that keep him down. I couldn't tell you what exactly has been going on but it died on the highway the other day , though it was fixed, and now the air bag situation - it's the whole thing about pouring money into a pit. Every year it has a few issues.

I believe he feels it's worth it though. Thanks for the references, will check them out.

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post #4 of 5 (permalink) Old 01-27-2005, 12:53 PM
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RE: Someone who knows the '71 300 SEL


If you are still looking for a shop, please consider my facility. I have nearly 20 years of experience on vintage Mercedes. This past fall I completely rebuilt the motor of a 300sel 6.3. The year prior it was the air suspension. I am well versed with air suspensions and the mechanical aspects of the w109 chassis. I am located in Lawrenceville which is in Gwinnett County.

Please drop me an email if I may be of service to you.


Mathieu J. Cama
Old World Automotive
Vintage Mercedes Repair and Mechanical Restoration
Serving the Mercedes community since 1986
Lawrenceville, GA

1961 Unimog 404S
1965 190c
1967 250s (for sale)
1970 280sl
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1982 280te
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post #5 of 5 (permalink) Old 01-30-2005, 04:34 AM
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RE: Someone who knows the '71 300 SEL

Have a look at the 3.5 photo i posted in the gallery section here.I had three,all running etc,(iknow people who have more !).The main thing is keeping the service up to scratch,the previous guy sounds like a rarity today.I do my own work as it's a hobby thing,and i feel these 109's are simple anyway.
If your dads car is sagging,it won't be a bag problem,more likely to be a valve.i check them by lifting the car up to full height and spraying soapy water all ovewr the valves.any little leak will show immediatly.It's a simple system.three height valves and a main valve under the hood.with a rubber bellows on each corner.
There is also a little bottle arangment on the inner fender which you fill with metholated spirits,or athonol.It keeps the air system dry and protects the valves.
Neil Dubey at star motors is the world Authority on valves and things and sells rebuilt valves for a fraction of the new price.
I'm rebuilding a 6.3 at present and have a 3.5 with severe rust which i'm going to use as a donor car for a V8 into a finny.[8D]
The fuel injection is a nice simple set up which needs to have the filter changed as often as the plugs ,even anually.Injectors will out last the car,and can be removed easily and cleaned with an ultrasonic cleaner.
These were among the most expensive cars in the world in their day and are considered to be very KOOL [8D]by a lot of younger folk.Look after your dad and his car,you won't regret it [:D]
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