20 Most Recent 1990 Mercedes-Benz S-Class Questions & Answers


its probably a broken wire on the seat belt system you will need to get it plugged into a merc star computor to fully diagnose

1990... | Answered on Jun 06, 2014


Have you checked for blown fuse in panel.

1990... | Answered on Jan 29, 2014


check the mass air flow sensor and air filter

1990... | Answered on Jun 17, 2013


Hi

The door switch in one of your doors is faulty... The switch that triggers courtesy lights when door is open then disables light when door closes.Also check did you turn it on with the interior dimmer control on your dash, left side of the steering wheel?

You may need to replace the latch mechanism in the door. But more than likely it is just stuck...if i am not mistaken; it is a magnet system so it just got jammed. All you have to do is spray the **** out of the door hinges and door looks with wd40 or some other spray. Actually the problem is that there is a sticky switch in the door latch mechanism. This switch is telling the computer that a door is open, even when it is not. Keep in mind that it may not be the driver's side door that is at fault, so you might want to do all 2 or 4 doors, depending on your model.
At each door you will see the latch mechanism. Just above these latches inside each door is the switches. To unstick these switches you will need 2 types of spray lubricant. Use WD-40 (or equivalent) and a can of silicon spray lubricant.
With the plastic tube attached on the WD40 you will spray inside the latch and in between the latch to get the spray to lube the switch. Flooding is preferred. Go to each door and do this. Open and close each door multiple times until the switch is free and the indicator lamp goes off.

Please get back to us if you have further query or else please accept the solution.

1990... | Answered on Sep 16, 2011


loose aux belt ?

1990... | Answered on Apr 13, 2010


Try the fuse first. If you have done this than the problem could be in the actuator on the trunk latch. Poss loose/bad wire or faulty unit? I hope this helps!

1990... | Answered on Jan 22, 2010


Hi:
I am pretty sure you are asking about a part called the heater core.

It is what gets hot ,and your fan blows across it, providing heating and defrost.

1990... | Answered on Nov 03, 2009


There should be a piece of paper in the fuse box that says fuse for flashers.

1990... | Answered on Jul 10, 2009


hi,300 s, with engine 6 cylinder ,jack-up your car for drain plug, 7.5 liters of oil change oil with filter,ty

1990... | Answered on Apr 12, 2009


wont till the timing is set

1990... | Answered on Mar 19, 2009


my specialist electrician said the problem was in the button (on-off)of z A/C ON Z panel of z driver.By z way my car is 1992.WHEN Z ENGINE GETS HEATED THE 2 FANS WORK FASTER AS ZEY USUALLY SHOULD DO.ZEN ZEY SLOW DOWN TO NORMAL SOFT SPEED.HIS DECISION IS TO LEAVE IT LIKE THAT AS IT CAUSES NO HARM.BEST GREETINGS TO YOU ALL.

1990... | Answered on Sep 22, 2008


Sounds like you have blown a hydraulic hose that operates the top mechanism. You will probably need to find a local mechanic that is experienced with hydraulic operated tops or a dealership. But check you owners manual. Most manufacturers have a manual way of operating the top to allow you to secure it until repairs can be made.

Mercedes-Benz... | Answered on Jun 28, 2019


The dealer has some problems with these I think. Bad fuses and such. Check to see if the blower motor is getting power after you turn it on. Check to see if the resistor block (in series prior to the blower motor) is good.

Mercedes-Benz... | Answered on Jun 18, 2019


It probably lost the rolling code, you need to find your owners manual and reprogram the system with your garage door opener, or the learning button on your garage door unit.

Mercedes-Benz... | Answered on Jun 04, 2019


Try disconnecting battery and clamp battery leads together for 5 minutes. Reconnect battery as normal Positive first on last off Hard reset to computer generally works with all models.

Mercedes-Benz... | Answered on Jun 03, 2019


Perform power window reset. If problem persists replace affected window switch sensor.

Mercedes-Benz... | Answered on Jun 03, 2019

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