Question about Mercedes-Benz Cars & Trucks

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1993 Mercedes 190E 2.6 Petrol 4speed auto 722.409-- has lacking indication of showing MPH on speedometer from O or stand still. When increase throttle above or over 1200 RPMS needle comes/jumps on line but maybe be lagging. Also transmission shifts 3 times, which I believe is correct "starting out in 2nd by design for this unit". but maybe showing a lagging reading on speedometer? Bought the car used clearing all discrepancies not registered yet so all test have been done on jack stands etc. I was running it one time at different speeds and all of sudden everything acted like it should sound & indication wise, but that has not repeated with 5 or 6 run-up test.

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  • Mercedes-Benz Master
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Bad connection in the dashboard or faulty ECU.

Posted on Mar 19, 2014

Testimonial: "ECU should show up on a code reading test and it does NOT nor does the cruise control actuator all codes are reading 1 or no fault. Now what there is a 4th gear solenoid problem my RPMS are higher than what should be by 500rpms or more. I'm thinking the correct level should be 1000rpms for 20MPH the unit now is 3500rpms at 60mph."

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Posted on Jan 02, 2017

  • 183 Answers

SOURCE: Replaced rear differential speed sensor

Did you use a mopar sensor.I have fixed this problem many times and not had much luck with the aftermarket sensors.Just a thought.Good Luck!!!

Posted on Aug 04, 2008

  • 599 Answers

SOURCE: 1989 Mercury Topaz Transmission problem !!!

overdrive should be activated by a solenoid ..internal and perhaps an external one also.. in 89 the computer was primitive and i dont think controlled shift points..also if engine health is bad or missing or vacuum to any cacuum modulator at trans is damaged or compromised.. these issues could occur...good luck

Posted on Dec 26, 2008

  • 71 Answers

SOURCE: Car Dies suddenly, May **** and jump at constant speed,

what is the year mahe and model of your jumpy jerkey car? is it throttle body injection carborated ot electronic fuel injection ?have you taken the fuel rail or line loose and tried blowing it out with a strong blast of compressed air ??if you changed the fuel filter and it was dirty and you say you changed the tank and fuel pump you more than likely
are experiancing what they often refer to as butterfly action in your fuel line or your injectors are plugging up sounds to me more like a piece of rust or something of that nature doing a little gate or butterfly trick on you .. a single piece of rust can cause trouble for years if it is big enough and in the right position in the fuel line.. take your fuel line loose at the tank, both ends of the filter and the injector rail and with a strong compressor blow backwards through the fuel line,both from the engine to the filter end and from the other filter end to the tank (caution ) ( caution ) do not i say do not blow compressed air backwards through the fuel pump you will blow a hole in the diaphram and ruin the pump adding to the expense or your repairs dramaticly..
if that dont do the trick my next suggestion would be get the code connector fixed and get a good reading on the computer ..one more thing how good are you with elictrical ? it could be a short in the ignition switch or wires going to it keep me posted we will try to get it sorted out for you good luck and i hope this helps
mrdmburns@cableone.net

Posted on May 04, 2009

  • 21 Answers

SOURCE: Auto Transmission wont shift out of 2nd gear

find a new mechanic

Posted on May 21, 2009

jasperoni
  • 203 Answers

SOURCE: vacuum testing on Mercedes diesel 123 chassis not making sense

Everything on this vehicle is vacuum operated. going into the vehicle at the left rear of engine compartment there are color coded vac. lines-green a/c,yellow central locking,black shutoff diaphragm, clear source, yellow w/red stripe reservoir. any one of these could be a potential leak of vac. On diesel engines they have too high of compression to produce vac. so M.B. put a vac. pump on the front of the engine which is driven by your camshaft. Usually engine vac. changes rapidly with throttle position but because this vac. is not as easily controlled there is a separate control valve called a aneroid compensator that meters the vac. to your modulator on your transmission. It can be adjusted but it requires a special tool( basically it is a dial wheel that fits onto the post of the compensater). I would first make sure your rubber grommet is not torn on your modulator valve. If it is it will need to be replaced. If you remove that grommet you will see a metal plunger which can be grabbed with needle nose pliers and rotated to the left or right. I believe right is a firmer shift and left is a softer shift. stat by rotating approx. 1/2 turn to the left and see how the shifting feels. My first suggestion is to unplug the green and yellow vac. lines and see if the trans. shifts better. On your valve cover is a lever labeled off in case you lose vac. to the shutoff diaphragm. Become familiar with that lever so you can shutoff your engine in case you accidentally unplug the shutoff valve. you will probably find either your central locking or a/c system is the root of the problem.

Posted on May 29, 2009

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1 Answer

Serpentine belt routing on 93 mercedes 190e 2.6


Go to the following link and the first photo shows the belt routing. I hope this helps as I know changing the belts on these vehicles can be a major pain in the neck.
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Changed the water pump on my 1993 Mercedes 190E and the car will start; it only clicks - what could be the problem?


Charge or replace the battery , if the starter clicks its just lacking the power to turn over. If its a relay clicking then you may want to put your car in neutral and try as your car is equipped with a neutral safety switch. You should have not disturbed anything that would keep it from starting so try that and well go from there.

Apr 29, 2010 | 1993 Mercedes-Benz 190

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I need a serpentine belt diagram for a 1987 Mercedes 190E


Serpentine Belt Diagram - 87 Merc 190E

Go to the following web site below (copy and paste the web address below into your browser)

http://www.daycoproducts.com/daycoweb.nsf/cf652a4feb630ad0862571a4005ae40c/a866a821123f887c862571a5006988df!OpenDocument

There are 2 PDF documents to open - above the photo on the site.

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Voluntary contributor.

Dec 13, 2009 | 1987 Mercedes-Benz Mercedes Benz 190 Class

1 Answer

190e auto.locks up as if selecting 2 gears.the


bushings in the gear selection linkage need replaced go to autohausaz.com or buymbparts.com for parts.

Aug 10, 2009 | 1993 Mercedes-Benz 190

1 Answer

Starting from cold


hello,location is in top of the engine,right side,standing in front,if you have problem in cold start,check first cold start valve,ty

Apr 20, 2009 | 1993 Mercedes-Benz 190

1 Answer

What transmission fluid can I use in my 1993 Mercedes Benz 190E


AF3 onepx.gif DEXRON®-III Automatic Transmission Fluid
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Mar 14, 2009 | 1993 Mercedes-Benz 190

1 Answer

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Jan 05, 2009 | 1993 Mercedes-Benz 190

2 Answers

Mercedes benz 190e 1900year /air flow meter connections


AS far as i understand it your air flow meter only controles your idle, not your air/fuel mixture. The mixture is controled by the Air/fuel mixture body that sits immidiatly below your fuel distributor. it has a 'tower' that reaches up to a hole in your aircleaner so you can get to it with an allenkey. To set the mixture correct it needs the aircleaner on. that screw changes the pivot point of the arm that gets depressed by the large round disk visual if the aircleaner is of. This is not a throttle butterfly, it mechanically 'measures' the airflow by being sucket down and pushing a plunger upwards into the fuel distributer increasing the amount of petrol to the injectors. You say gas as a supplement... I assume you mean Hydrogen Fuelcell. Because if your trying to 'add' instead of replacing with LPG or Natural Gas you will have a problem as LPG for example needs to ignite earlier. For example if the petrol engine fires at 6 deg BTC on petrol, than converted for LPG it needs to fire at 16 deg BTC on their original plugs (newer plugs are available that allow for an acceptable setting suitable for both fuels but all i everseen when petrol was still present when switching to LPG is an 'engine bay' fire)... But assuming your talking Hydrogen fuel cells as a supplement to try and reduce your fuel consumtion than the element that could create a problem for you is the Lamda probe (Oxygen sensor) in your exhaust as it may think that your fuel mixture is to lean and tries to increase fuel through the cold start injector or the electronic pressure regulator on the fuel distributer. I hope this will help you somewhat.

Aug 08, 2008 | 1989 Mercedes-Benz 190

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