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1-17 of 17 Results
  1. W126 S,SE,SEC,SEL,SD,SDL Class
    Hello all, not sure if I’m making this thread correctly so feel free to re-route me. 1990 420SEL 136k miles I don’t like bringing my problems onto other people but this is my last resort. Hopefully some of you W126 experts can point me in the right direction as I had a major issue happen over...
  2. W126 S,SE,SEC,SEL,SD,SDL Class
    I am going to replace the K1 spring in my transmission. I'm doing this because I've noticed a flare from 2nd to 3rd under partial throttle. Has anyone been able to find good instructions on how to do this job? I found this old post, but all the helpful pictures just aren't there. I noticed that...
  3. W126 S,SE,SEC,SEL,SD,SDL Class
    Having an issue with my 1986 420SEL: got in to go for a drive, and some switches/buttons stopped working. The window switches and wiper switch (on the stalk) stopped working all at once. The turn signals still work fine. Just kind of a sudden failure. All the fuses look fine, and I got a new...
  4. W126 S,SE,SEC,SEL,SD,SDL Class
    Hey everyone, I reconnected the battery on my 420SEL a few days ago and noticed that no matter what I do, I can't get the car to accelerate (see video below). It doens't matter what gear I am in. I tried them all... the car will only CRAWL and the RPMs are not surpassing 1000 which has me...
  5. Member Classifieds
    Hi all, Frequent lurker, first time poster here looking to purchase a gently used 420SEL/500SEL/560SEL with detailed maintenance records in the Dallas, TX area. I have owned several European marques before, but this will be my first foray into Mercedes-Benz. My parents owned a 350SE in the late...
  6. MEC Design W126 Exhaust stainless steel V8 500SEC 560SEC 500SEL 560SEL

    MEC Design Sport Exhaust System for W126 V8 380 + 420 + 500 + 560 SE/SEL/SEC, Sound version Eartquake Stainless steel complete system from catalyst, end pipes as original (OEM) 2x55mm, embossed MEC Design Logo on the bottom of the mufflers, consists of 1 rear muffler and 1 middle muffler and 1...
  7. W126 S,SE,SEC,SEL,SD,SDL Class
    Hi everyone, I currently have a 2010 E350 Coupe but after getting it I realized I needed another Benz, hence I started looking. I found a 1989 40SEL. That appears to be in decent condition, minor seat tear in the drivers seat, other than that the interior is pretty sound, bummed that they stuck...
  8. W126 S,SE,SEC,SEL,SD,SDL Class
    On my recently acquired 1990 420sel, I have very strange issue; Driver's seat and telescopic steering column with memory function I know that my safety warning relay is bad since I do not get dome light turned on by opening driver doo, nor do I get driver seat energized to adjust, however...
  9. W126 S,SE,SEC,SEL,SD,SDL Class
    Wanted to say thank you for both this forum and its contributing members, As a result of your posts and discussions I was able to basically rebuild a 300SE for our local pastor who could not afford a new vehicle and dearly loved his old 'Benz I am now troubleshooting his 1986 420 sel, Symptoms...
  10. W126 S,SE,SEC,SEL,SD,SDL Class
    Hey all! So I've been trying to trouble shoot my 87 420sel last couple days. The starter isn't coming on when I turn the key over. The fuel pump come's on and when I turn the key over I can hear the electrical bog down but no noise from the starter. I shifted it from park to neutral and back a...
  11. W126 S,SE,SEC,SEL,SD,SDL Class
    I started my car and let it run for a while this morning. Then I turned it off to switch batteries and when I rent to restart it the starter doesn't come on. I can hear the fuel pump and all that come on but it doesn't crank. Any and all help would be appreciated. Yes I tried the old battery...
  12. W126 S,SE,SEC,SEL,SD,SDL Class
    The odometer had stopped working and ended up replacing the 3 plastic gears in the Odometer and its now working. In the process had to remove the Instrument cluster and am now having issues with the fuel gauge and temperature gauges not working. I noticed a broken solder and am going to solder...
  13. W126 S,SE,SEC,SEL,SD,SDL Class
    I had the great idea of doing doughnuts and burnouts in my '86 420SEL, now the car has 5 neutrals. It started acting up on the drive home, it would rev to 2-3k RPM before moving. It started working fine again until it completely gave up the ghost starting on a hill yesterday. None of the...
  14. W126 S,SE,SEC,SEL,SD,SDL Class
    Hello everyone. I'm working on a 1990 Mercedes 420SEL. My problem area is duct work routing under the dash, drivers side. The owners original complaint was the A/C was not blowing cool. I connected my AC gauge/manifold set and determined that the expansion valve was likely faulty. Upon...
  15. W126 S,SE,SEC,SEL,SD,SDL Class
    Hi There, I'm 100% a newb, and not a regular part of this community, so kindness appreciated- figured this is the best place to ask where one recommends trying to sell a complete 1991 420 SEL in parts condition. It was running until it made a noise in December and now is stagnant. I'm in...
  16. W126 S,SE,SEC,SEL,SD,SDL Class
    I've noticed the O2 sensor light comes on while I drive - sometimes - and stays on until I stop, turn off and restart the car. When its present, the car behaves odd. Engine feels like its working harder to keep the car going, almost like a jerky motion The car idles rough when I stop and...
  17. W126 S,SE,SEC,SEL,SD,SDL Class
    Ok, so I just bought a black on black 1990 420SEL that I’m chasing a few issues on. It has black exterior with the grey trim and it has black interior as well. I can maybe get the paint code later if wanted. But i have a question. I’m also selling my 86 sec project to help fix this and because l...
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