Question about 1987 Mercedes-Benz 300-Class

1 Answer

1987 Mercedes 300e I got a couple of problems really

I got a couple of problems really, the remote locking works fine to lock the car but when i try and open it the front locks pop up then go back down again and have to use the key to open (which still works fine) also for the past two years if i have driven over 80 the transmission fluid blows out. Taken it to get looked at over and over again and they keep telling me they cant find a problem and recentley it started happening at 65. If anyone can help at all it would be much appreciated.

Posted by on

  • 2 more comments 
  • paulypauly Jun 17, 2009

    well it covers the whole of the underneath of the car when it does, so im guessing it wouldnt be the dipstick tube? unless that may have a hole in it somewhere?

  • paulypauly Jun 18, 2009

    cheers for that been more helpful than a lot of garages I've been to.

  • paulypauly Jun 18, 2009

    thanks that is brilliant and very much appreciated so cheers again for the trans and the c/l info been very helpful indeed.

  • Ryan Jasper
    Ryan Jasper May 11, 2010

    wher does the trans fluid blow out of the breather or the dipstick tube- it sounds like the breather is clogged.



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 203 Answers

Replace the breather at the top of the bell housing and service your transmission

Posted on Jun 17, 2009

  • Ryan Jasper
    Ryan Jasper Jun 18, 2009

    There really is not much else that would cause an intermittent leak that is heat related on an automatic trans. The pressure is building up and forcing clogged fluid out the breather, as far as your central locking issue-your central locking is vacuum operated by a pump located under the rear seat cushion. It has input from micro switches located in the key tumblers at both front doors and your trunk lid. I would open my driver's door and you will see a black plastic cover on below the grab handle on the sriker panel of the door. remove that cover and you will find a 3 pole electrical connector-take an ohm meter and make sure it is showing continuity in both positions of the lock actuator. You can replace just the micro switches if necessary also you may find the tumbler loose because the roll pin that drives the actuator arm fell out-you will see what i'm talking about easiest with the door panel removed. I just felt that your transmission issue was more of a priority but I hope I have been helpful.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

1987 mercedes 300E wont start. the oil pressure is

No, I would say your starter may be going out. Also tune up (coils especially) should be done before any real troubleshooting.

Feb 22, 2010 | 1987 Mercedes-Benz 300-Class

1 Answer

My 1987 Mercedes 300e won't start and idk why

sounds like the fuel pump! have to test it and the relay! could be hunderd or a few bucks.

Sep 16, 2009 | 1987 Mercedes-Benz 300-Class

1 Answer

How to install a waterpump on a 1987 mercedes 300e ?

First of all, remove the water hose pipes, unclip radiator, lose the fan belt (see the tightening screw at the back of the generator), remove the fan belt (remember the sequence to reinstal), unsrew the fan bolt and take the fan off, then remove radiarot, behind the radiator, there is the water pump screwed by 6 bolts, unscrew the bolt and u will get that! Hope this will solve the problem

Sep 13, 2009 | 1987 Mercedes-Benz 300-Class

1 Answer

I have a 1987 Mercedes 300E and the A/C compressor will just shut off. When this happens power is lost to the compressor. Can you assist with what would cause this problem.

hello,hoping your freon is full,check your fuse for air con system,maybe your pressure sensor in your dry tank is defective, check your aircon relay in back of your battery,pull out,check if have burn smell,before you replaces the relay try to check first the resistance of your magnetic clutch,ty

Apr 21, 2009 | 1987 Mercedes-Benz 300-Class

1 Answer

Ignition key won't turn lock ssembly

hi,seem your steering lock mechanism is defective,if you to try,remove your under dash,you can your steering lock, loose bolt in clamp,fine a small lock drill out,then you can turn your ignition switch,you can also remove the wiring in the back of steering lock,renew your lock mechanism,ty

Mar 21, 2009 | 1987 Mercedes-Benz Mercedes Benz 500 Class

1 Answer

The security system keeps going off in my 1987 mercedes 300e. using the key in the drivers door doesn't work to turn it off. can i remove the fuse to disable it for now? if so, where is it located?

Probably a dirty micro switch which is built into the driver's door lock. I believe you could verify this by using the key in the passenger front door or the trunk lock. Either of these, which are used much less, should unlock the doors without sounding an alarm.

Most people unplug the alarm module which is under the floor mats in the front passenger's area. If you want to try to clean the switch, a aersol can of tuner cleaner/lube from Radio Shack, will probably restore the function of the micro switch. Mercedes is notorious for using silvered contacts that tarnish just enough to hinder continuity.

Jim in Phoenix

Jan 09, 2009 | 1987 Mercedes-Benz 300-Class

1 Answer

Central locks on mercedes

Hello, Mercedes fuses will sometimes fool you. You need to take a pick or very small screw driver and physically touch the wire on the fuse to see if it has a small split in it. I have had many occasions where the fuse looked good and even metered good but when an amp draw came along it would open.
I hope this helps.
CYA, Gator241

Dec 29, 2008 | 1987 Mercedes-Benz 300-Class

2 Answers

Automatic door locks will not unlock

I would order a new door lock panel that goes on your driver side door, you mite be able to get a used one by looking on line. It sounds like the contacts have gone bad. I have replaced the control panel before. To fix one of these if your really trying to fix it your self is not worth the time and technical skill you need to do this. Its easier and quicker to just go to junk yard or part store and get a new one.


Dec 04, 2008 | 1992 Mercedes-Benz Mercedes Benz 300 Class

Not finding what you are looking for?
Cars & Trucks Logo

262 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers


Level 3 Expert

81400 Answers

Joseph Prosser

Level 3 Expert

772 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides