1979-1991 Mercedes-Benz R107 + W126 - Auto-Trend Repairs and Service Information Forums

SELLC · SELLC

Been on the prowl for a set of used rims for the Mercedes and I was wondering what the difference between the Mercedes AMG Monoblock rims were compared to the OZ rims? Seems to me the two are very similar, with the OZ rims being a three piece studded setup, with more of a dished or offset center. Would this b...

jpm3 · jpm3

Seat is stuck in the furthermost rear position. The rear of the seat will not elevate. It will not move forward. I installed a new switch. At least one motor continues to "try" to operate, even with the key removed. One motor gets very hot. So, how in the name of all that is holy do you remove the two r...

SELLC · SELLC

Recently I had a customer come in and win the award for the worst looking monovalve I have ever seen! LOL Needless to say when your monovalve gets this nasty, your heater is not going to be so hot. [img]http://www.autotrend.us/b...

SELLC · SELLC

Recently picked up a 1990 Mercedes Benz 420 SEL that had a high idle every now and again when warm, then eventually it just kept on getting higher until I did something about it. At the start it idled up around 1000 rpm, when warm, which went back down to normal when you put in in drive, but under a fair amoun...

SELLC · SELLC

I've never had a sunscreen in any of my W126 Mercedes before, but it appears this recent acquisition (1990 420 SEL) has one. At first I thought it was just something someone put in there, but after closer examination it appears this unit is from the factory because of how it's integrated into the packag...

Rastus · Rastus

Hello folks, Recently, my little M116, 3.5ltr V-8 started playing-up, & in typical MB fashion, stopped playing-up when you popped the bonnet to have a look at things ! The symptoms were very similar to what you may experience when you acquire a little bit of water in your fuel, & being winter...

SELLC · SELLC

Someone in the family forwarded me this video on Facebook https://youtu.be/m9md97nN_SQ I thought it was pretty cool that he thought of us when he seen it. Figures they would come out with a cool Mercedes SL song after I buy a new Corvette! LO...

SELLC · SELLC

Well, I can't quite explain it... I was making a right off the expressway and the guy in front of me took off, as I looked to the left the coast was clear for 1/2 mile. Turned my head back and the guy with a Big Horn Ram was standing on his brakes! So the Mercedes bit him. I don't know why the Mercedes wanted to ta...

SELLC · SELLC

It's about that time to do a set of guides, rails and chain. Of course, in the process you always want to nail as many "while you're in there" items as well. Noticed that Parts.com is no longer showing as available all the good parts they used to offer, things like valve cover gaskets, antenna...

SELLC · SELLC

Was checking out some exhaust parts the other day when I noticed a new aftermarket catalytic converter setup for the 420 and 560's! I have put a great deal of MagnaFlow converters on many different cars and trucks, in most all cases the fit and finish was really good. It's Magnaflow part # 23836 [img]ht...

SELLC · SELLC

I have for sale a very good condition w126 sunroof track Mercedes Benz Part #'s 126 782 11 12 126 782 12 12 126 782 13 24 124 782 05 47 124 782 06 47 That will fit 1986-1991 Mercedes Benz w126 Sedans. This unit is a rare find and the retail cost for this item IF you can find it is well over $700!! Feel free to e-ma...

SELLC · SELLC

Was on my way to Detroit a few weeks back and I got into it with a mid 2000's S600. Ate him up at high speed several times. It was wonderful I tell you! Three times I had to walk that S600 because even he couldn't believe it! Was so proud of my 560 that night! Guess come one to find out these newer S600's are no ma...

SELLC · SELLC

Recently I was experiencing a long crank time to start and rich exhaust fumes on my Mercedes-Benz 560 SEL. Upon removing the spark plugs I found that the gaps had opened up to almost .070 Gap! I like to test different plugs and I had elected to try an NGK plug and overall they did well for a little while but I...

SELLC · SELLC

Well, I see it an awful lot around here... Broken timing chain guides that end up destroying an otherwise healthy engine. In this case the customer was literally in two months prior to this chain guide giving up the ghost and at that time I told the customer to get the guides done as soon as possible. Nev...

SELLC · SELLC

Downloaded Deadmau5's new tunes sever weeks back... I been getting my $$$'s worth...

SELLC · SELLC

Here is a thread for people looking to track a pesky exhaust smell inside the vehicle. While this is only one of many dangerous exhaust leaks its extra lethal as it can catch the vehicle on fire! What we are looking at here is the exhaust crossover (Traverse Tube) pipe found on most all V8 Merc...

SEL420 · SEL420

best way to remove pistons would be appreciated! All bolts are off staring at crankshaft wondering how to remove pistons, hopefully without the need of a 'special' tool. Pic attached appreciate your time!

SELLC · SELLC

I wanted to post up these photos for people having problems removing their balancers on the Mercedes Benz M117 and M116 V8 engines. It would appear the biggest problem people are having (DIY'ers) is getting that large center bolt loose, often times because the 4 washers on said bold get rusty and will...

SELLC · SELLC

This morning was one of the coldest mornings so far for the winter season here in Michigan with a temp of -4 bellow and a wind chill factor of -24 below! I was curious how the Mercedes was going to react to such cold temps as I needed to go somewhere. To my suprise when I got in and went to fire her up she turned a...

SELLC · SELLC

I am sure we can shave 5 or so seconds off our project drag Benz. I plan to be the first on video with a W126 chassis doing a wheel stand! I think I will post cool videos of people beating the snot out of their Mercedes in this thread. Feel free to add t...

SEL420 · SEL420

Looking for rebuilt 126 for my 91 420SEL. Any suggestions would be appreciated. Cost I should expect?

SELLC · SELLC

SEL420 · SEL420

Ok guys... many of threads about the bottom bolt issue when removing the water pump. I have removed the 6 bolts in the harmoic balancer. This thing will not budge! Should I simply hit a few times with rubber mallet? I'm really nervous about all the talk about making sure to know it's current positi...

SELLC · SELLC

Recently we were loaned a coil spring compressor from Graftdesign to aid in our salvage efforts on a Mercedes-Benz 420 that we have. While we have yet to give it a whirl, it looks to be a good design and should make front coil spring removal a breeze. We will have detailed photos of how this tool works late...

Rastus · Rastus

Hello people, The efficiency of an engine may be defined as the ratio of the "power" obtained, to the "power" supplied. In our gasoline-engines, there are many losses, so that in relation to the inherent "power"in the fuel ( stored liquid energy ), only about 15% ap...

Rastus · Rastus

Hello folks, We all take for granted that when we turn-the-key & start our engines, that we can go about our business & do what we've got to do. This is a good thing, but it's worth knowing what actually happens from that moment, & why keeping your oil in good condition is worth its weight in g...

SELLC · SELLC

Was going thru some photos the other night and I come across this In my web ramblings I met a dude from a Mercedes forum in Scotland. This is the exhaust he was running and I was so impressed with it at the time, still am now. Just wondering what sor...

Rastus · Rastus

Hello people, There's always been some debate about fuel mixtures, & how a "rich" mixture will provide you with more power, & how a "lean" mixture will provide you better mpg... But what is the best way to go, & are there any compromises ? What does a Rich & Lean m...

SELLC · SELLC

I have been seeing more and more people installing the wrong transmissions in their Mercedes. Many people are under the false impression that all transmissions for the V8 86-91 Mercedes are the same. This is absolutely wrong and should you install the wrong year/part number you could be in for a host...

SELLC · SELLC

One of the first things to check when having problems such as a high idle, hesitation or drive-ability problem should be the vacuum. It's true most all V8 Mercedes have a built in "Economy" gauge that is in essence a "vacuum" gauge but that's just not meant for diagnosis. If one f...

Topic		Started By	Replies	Views	Last Post
	Difference between Mercedes Benz OZ and AMG Monoblock rims? (Preview) Been on the prowl for a set of used rims for the Mercedes and I was wondering what the difference between the Mercedes AMG Monoblock rims were compared to the OZ rims? Seems to me the two are very similar, with the OZ rims being a three piece studded setup, with more of a dished or offset center. Would this b...	SELLC	0	3216	06:33 PM Apr 19, 2017 by SELLC
	560SEC passenger seat removal W126 seat removal difficult power seat removal (Preview) Seat is stuck in the furthermost rear position. The rear of the seat will not elevate. It will not move forward. I installed a new switch. At least one motor continues to "try" to operate, even with the key removed. One motor gets very hot. So, how in the name of all that is holy do you remove the two r...	jpm3	6	2942	11:08 PM Mar 25, 2017 by SELLC
	W126 Monovalve Photos - Heater Problems HVAC Mercedes-Benz (Preview) Recently I had a customer come in and win the award for the worst looking monovalve I have ever seen! LOL Needless to say when your monovalve gets this nasty, your heater is not going to be so hot. [img]http://www.autotrend.us/b...	SELLC	8	7866	12:08 AM Feb 13, 2017 by SELLC
	1990 Mercedes Benz W126 V8 560 / 420 HIGH IDLE WHEN WARM. Mercedes 560 420 High Idle IAC Motor (Preview) Recently picked up a 1990 Mercedes Benz 420 SEL that had a high idle every now and again when warm, then eventually it just kept on getting higher until I did something about it. At the start it idled up around 1000 rpm, when warm, which went back down to normal when you put in in drive, but under a fair amoun...	SELLC	4	4369	05:22 AM Feb 2, 2017 by Rastus
	How do you raise and lower the rear sunscreen / shade in Mercedes Benz 420 / 560 SEL? (Preview) I've never had a sunscreen in any of my W126 Mercedes before, but it appears this recent acquisition (1990 420 SEL) has one. At first I thought it was just something someone put in there, but after closer examination it appears this unit is from the factory because of how it's integrated into the packag...	SELLC	8	4039	04:45 PM Feb 1, 2017 by SELLC
	BOSCH D-Jetronic Trigger Point problems & solutions (Preview) Hello folks, Recently, my little M116, 3.5ltr V-8 started playing-up, & in typical MB fashion, stopped playing-up when you popped the bonnet to have a look at things ! The symptoms were very similar to what you may experience when you acquire a little bit of water in your fuel, & being winter...	Rastus	17	9014	08:42 PM Sep 12, 2016 by SELLC
	New Mercedes-Benz SL Video - 80's Mercedes (Preview) Someone in the family forwarded me this video on Facebook https://youtu.be/m9md97nN_SQ I thought it was pretty cool that he thought of us when he seen it. Figures they would come out with a cool Mercedes SL song after I buy a new Corvette! LO...	SELLC	2	2217	02:53 AM Aug 15, 2016 by SELLC
	Took on a Ram with my Mercedes Benz 560 (Preview) Well, I can't quite explain it... I was making a right off the expressway and the guy in front of me took off, as I looked to the left the coast was clear for 1/2 mile. Turned my head back and the guy with a Big Horn Ram was standing on his brakes! So the Mercedes bit him. I don't know why the Mercedes wanted to ta...	SELLC	6	3169	02:59 PM Jul 24, 2016 by SELLC
	Getting harder to find W126 Mercedes Benz Parts!? (Preview) It's about that time to do a set of guides, rails and chain. Of course, in the process you always want to nail as many "while you're in there" items as well. Noticed that Parts.com is no longer showing as available all the good parts they used to offer, things like valve cover gaskets, antenna...	SELLC	4	2849	10:16 PM Mar 14, 2016 by SELLC
	Aftermarket Magnaflow Catalytic converter PN 23836 for 560 and 420 SEL Mercedes Benz. (Preview) Was checking out some exhaust parts the other day when I noticed a new aftermarket catalytic converter setup for the 420 and 560's! I have put a great deal of MagnaFlow converters on many different cars and trucks, in most all cases the fit and finish was really good. It's Magnaflow part # 23836 [img]ht...	SELLC	3	2883	12:25 AM Mar 5, 2016 by Rastus
	Mercedes-Benz Sunroof track 1986-1991 w126 Sedan Used Parts Mercedes Benz W126 560 420 SEL Sunroof Moonroof tracks (Preview) I have for sale a very good condition w126 sunroof track Mercedes Benz Part #'s 126 782 11 12 126 782 12 12 126 782 13 24 124 782 05 47 124 782 06 47 That will fit 1986-1991 Mercedes Benz w126 Sedans. This unit is a rare find and the retail cost for this item IF you can find it is well over $700!! Feel free to e-ma...	SELLC	5	8840	10:55 AM Oct 27, 2015 by darren1967
	560 SEL Beats the snot out of a mid 2000's S600 on the expressway! (Preview) Was on my way to Detroit a few weeks back and I got into it with a mid 2000's S600. Ate him up at high speed several times. It was wonderful I tell you! Three times I had to walk that S600 because even he couldn't believe it! Was so proud of my 560 that night! Guess come one to find out these newer S600's are no ma...	SELLC	5	2065	04:11 AM Oct 26, 2015 by SELLC
	Found Resistor-less spark plug replacement for 560 SEL / SEC / SL (Preview) Recently I was experiencing a long crank time to start and rich exhaust fumes on my Mercedes-Benz 560 SEL. Upon removing the spark plugs I found that the gaps had opened up to almost .070 Gap! I like to test different plugs and I had elected to try an NGK plug and overall they did well for a little while but I...	SELLC	2	2752	02:10 AM Apr 25, 2015 by SELLC
	Mercedes Benz 420 SEL Timing Chain + Valve and Seal Replacement due to broken chain guide - M116 V8 (Preview) Well, I see it an awful lot around here... Broken timing chain guides that end up destroying an otherwise healthy engine. In this case the customer was literally in two months prior to this chain guide giving up the ghost and at that time I told the customer to get the guides done as soon as possible. Nev...	SELLC	38	13337	10:02 AM Sep 5, 2014 by SELLC
	Mercedes - Deadmau5 (Preview) Downloaded Deadmau5's new tunes sever weeks back... I been getting my $$$'s worth...	SELLC	1	1310	11:23 PM Aug 14, 2014 by SELLC
	Deadly known exhaust leak problem/smell inside cabin (Preview) Here is a thread for people looking to track a pesky exhaust smell inside the vehicle. While this is only one of many dangerous exhaust leaks its extra lethal as it can catch the vehicle on fire! What we are looking at here is the exhaust crossover (Traverse Tube) pipe found on most all V8 Merc...	SELLC	7	8864	08:17 AM Jun 24, 2014 by SELLC
	420 Piston removal (Preview) best way to remove pistons would be appreciated! All bolts are off staring at crankshaft wondering how to remove pistons, hopefully without the need of a 'special' tool. Pic attached appreciate your time!	SEL420	7	1725	05:05 PM Feb 24, 2014 by SELLC
	Mercedes Benz V8 lower PULLEY / BALANCER removal M117 / M116 560 / 420 (Preview) I wanted to post up these photos for people having problems removing their balancers on the Mercedes Benz M117 and M116 V8 engines. It would appear the biggest problem people are having (DIY'ers) is getting that large center bolt loose, often times because the 4 washers on said bold get rusty and will...	SELLC	4	2432	04:46 AM Feb 3, 2014 by Rastus
	-24 Below Zero and the 16 year old Mercedes Benz starts with ease! (Preview) This morning was one of the coldest mornings so far for the winter season here in Michigan with a temp of -4 bellow and a wind chill factor of -24 below! I was curious how the Mercedes was going to react to such cold temps as I needed to go somewhere. To my suprise when I got in and went to fire her up she turned a...	SELLC	17	3894	07:05 PM Jan 20, 2014 by Rastus
	What does a stock 560 SEL do in the 1/4 mile? ( 1 2 ) (Preview) I am sure we can shave 5 or so seconds off our project drag Benz. I plan to be the first on video with a W126 chassis doing a wheel stand! I think I will post cool videos of people beating the snot out of their Mercedes in this thread. Feel free to add t...	SELLC	70	27463	06:57 AM Dec 27, 2013 by Rastus
	Need engine (Preview) Looking for rebuilt 126 for my 91 420SEL. Any suggestions would be appreciated. Cost I should expect?	SEL420	17	2023	04:30 AM Oct 30, 2013 by SELLC
	How to clean your Mercedes hood star ornament! (Preview)	SELLC	1	2563	08:54 AM Oct 29, 2013 by SELLC
	91 420 SEL - Water Pump removal (Preview) Ok guys... many of threads about the bottom bolt issue when removing the water pump. I have removed the 6 bolts in the harmoic balancer. This thing will not budge! Should I simply hit a few times with rubber mallet? I'm really nervous about all the talk about making sure to know it's current positi...	SEL420	14	4361	08:15 PM Sep 29, 2013 by SEL420
	Mercedes-Benz W126 Front Coil Spring tool. (Preview) Recently we were loaned a coil spring compressor from Graftdesign to aid in our salvage efforts on a Mercedes-Benz 420 that we have. While we have yet to give it a whirl, it looks to be a good design and should make front coil spring removal a breeze. We will have detailed photos of how this tool works late...	SELLC	5	5527	06:10 AM Aug 25, 2013 by SELLC
	Engine Efficiency (Preview) Hello people, The efficiency of an engine may be defined as the ratio of the "power" obtained, to the "power" supplied. In our gasoline-engines, there are many losses, so that in relation to the inherent "power"in the fuel ( stored liquid energy ), only about 15% ap...	Rastus	5	2344	10:12 PM Jul 15, 2013 by Rastus
	Oil & Lubrication. So what does go on in your engine ? (Preview) Hello folks, We all take for granted that when we turn-the-key & start our engines, that we can go about our business & do what we've got to do. This is a good thing, but it's worth knowing what actually happens from that moment, & why keeping your oil in good condition is worth its weight in g...	Rastus	2	1640	04:43 AM Jul 5, 2013 by Rastus
	Now this is a W126 HIGH Performance Exhaust System! A+ Drool towel required! (Preview) Was going thru some photos the other night and I come across this In my web ramblings I met a dude from a Mercedes forum in Scotland. This is the exhaust he was running and I was so impressed with it at the time, still am now. Just wondering what sor...	SELLC	5	7638	05:25 AM Jun 14, 2013 by Tony H
	The Pro's & Con's of Fuel Mixtures (Preview) Hello people, There's always been some debate about fuel mixtures, & how a "rich" mixture will provide you with more power, & how a "lean" mixture will provide you better mpg... But what is the best way to go, & are there any compromises ? What does a Rich & Lean m...	Rastus	0	5603	01:18 PM Jun 10, 2013 by Rastus
	Mercedes-Benz Transmission Part Numbers - Useage Guide W126 420 and 560 Sedans (Preview) I have been seeing more and more people installing the wrong transmissions in their Mercedes. Many people are under the false impression that all transmissions for the V8 86-91 Mercedes are the same. This is absolutely wrong and should you install the wrong year/part number you could be in for a host...	SELLC	5	18695	09:52 PM Jun 5, 2013 by Rastus
	Mercedes Benz W126 + R107 Vacuum Test Instructions for V8 420 + 560 SEL / SEC / SE / SL (Preview) One of the first things to check when having problems such as a high idle, hesitation or drive-ability problem should be the vacuum. It's true most all V8 Mercedes have a built in "Economy" gauge that is in essence a "vacuum" gauge but that's just not meant for diagnosis. If one f...	SELLC	2	12718	02:34 PM May 27, 2013 by SELLC
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