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Old 07-24-2006, 10:03 AM
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Join Date: Sep 2004
Location: Seattle, WA
Posts: 111
85 300SD - aka The Trail King

Being a hiker in the great Northwest means a lot of driving on forest service roads to get to the trailhead. These roads are unpaved, potholed, washboarded, steep, and for the most part travelled by SUV's.

The 126 performs like a champ in this environment. It just eats up the bumps and handles perfectly. Its funny to watch people in SUV's bouncing around inside their cabins as they rumble over the rough road while I'm cruising in comfort down a steep climb. Pretty cool.

I did hit a snag though. When I was descending, I put it in 2nd and let the engine do the braking. After about 45 minutes the road levelled out and I finally engaged the throttle again. When I did, the gas pedal was sticky. Actually, its only sticky when you initially engage the pedal. I have to give it a little push with my foot and then the pedal works normally. I lubed all of the ball joints on the throttle assembly, but no change. Any ideas?

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Old 07-24-2006, 12:17 PM
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Electrical Engineer
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
bent linkage? check everything from the back of the pedal all the way thou...maybe somthing is blocking the linkage (running to the bowden cable for the trans) on top the valve cover?
Cruise Control not working? Send me PM or email ( I might be able to help out.
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82 300SD 145k
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Old 07-24-2006, 12:38 PM
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Join Date: May 2003
Location: Northern, Virginia
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Maybe the gas pedal is in the way of the diesel pedal.

Peach Parts W124.128 User Group.

80 280SL
85 300SD
87 300TD
92 300D 2.5 Turbo
92 300TE 4Matic
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Old 07-24-2006, 01:48 PM
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Location: Cupertino, CA
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Funny, I was just up in the mountains with my w123 300d euro and was driving on some nasty roads as well. My friends were also up there so we had 2 cars, mine and a 2003 ford ranger. Going up and down the mountain roads we flew compared to him. They were bouncing around and looked very uncomfortable. It was a little bumpy in my car but not too much worse than driving on our highways.
-Zack K.

1983 300d Turbo (Daily Drive) -- 243,000 miles
1979 280ce AMG (Beginning extreme restoration) -- 141,410 miles
1979 Yamaha Chappy LB50 (Awating new points) -- 1411.6 miles

1981 300d Euro 4 speed -- 188,421 km -- SOLD
1979 300d Euro 4 speed (Sold to Brother) -- 257,000 miles

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Old 07-24-2006, 02:48 PM
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Location: Seattle, WA
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Turned out to be a broken diesel pedal. Surprised to find out that these things are held together with just a rubber grommet.
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Old 07-24-2006, 09:41 PM
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Join Date: Sep 2004
Location: Seattle, WA
Posts: 111
Installed a new pedal tonight - worked like a charm.

Interestingly, shifts are smoother now. Also have to wonder if this will improve the cruise control. Mine works, but has been prone to cutting out when going up hills and has been difficult to set. My understanding is that the accellerator pedal moves in conjunction with the throttle variations as the car moves over differing terrain. Since the connection between the accellerator pedal and the throttle assembly is a simple rubber grommet, I can see how a worn pedal and spotty cruise might be connected. In any case, its a cheap fix that could save time and money when trying to diagnose problems.
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Old 07-24-2006, 11:11 PM
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Join Date: Jul 2006
Posts: 5
King of the road!

I too had a 85 300SD, it was the best vehicle I ever had, 195,000 miles! Bought it new and it never cost me a dime. it finally succumbed to body rot and steering and rear end problems - car was no longer safe to let my wife drive. Bought a new E320 in 2003, not a bad car but not like my King of The Road. Enjoy yours!
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Old 07-24-2006, 11:20 PM
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Ghost of Diesels Past
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Originally Posted by cherkez
. Bought a new E320 in 2003, not a bad car but not like my King of The Road. Enjoy yours!
the CDI or the gazzer?
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Old 07-25-2006, 12:21 AM
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It would have to be the gasser, since the E320CDI didn't go on sale in the US until 2005.
Board Member of MBCA|Houston

81 MB 300SD, 82 MB 300D Turbo (sold), 04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.
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Old 07-25-2006, 09:40 AM
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85 300D 4spd+tow+h4
Join Date: Apr 2006
Location: Atl Gawga
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You should try a 300TD on dirt roads. I whooped up on a 240HP WRX with my 300TD (NA even 80HP!). He was setup for roads and had to feather it over bumps. I loved it!
1987 300D Sturmmachine
1991 300D Nearly Perfect
1994 E320 Cabriolet
1995 E320 Touring
2001 Eurovan FOR SALE
1985 300D car, sold and missed.
OBK #42
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Old 07-25-2006, 11:01 AM
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Old 07-25-2006, 11:31 AM
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Ghost of Diesels Past
Join Date: Oct 2005
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ive gone "muddin" with my friends and their 4x4 trucks... of course i stuck to the flat muddy land and no dream would be a rally w123.. not diesel but a CE modded to rally

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