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Pelican Technical Article:

Starter Replacement

Steve Vernon

Time:

2 hours2 hrs

Tab:

$225

Talent:

***

Tools:

10mm, 13mm, 17mm socket

Applicable Models:

Mercedes-Benz W124 (1986-95)

Parts Required:

New or rebuilt starter

Hot Tip:

Make sure you have disconnected the battery

Performance Gain:

Car cranks easily again

Complementary Modification:

Replace ground strap

If your starter is beginning to make clicking sounds and not starting the motor or it is not turning the motor over as easily as before, it may be time to replace your starter before it leaves you stranded at the side of the road. Make sure to check the battery and connections first. If you remove the starter most local parts stores will load test it for you for free and some places can now perform the test with the starter still in the car. The replacement of the starter on the W124 is a bit of a tight fit but you should be able to replace it in a little more than an hour.

The starter comes out from under the car so you will have to jack up and safely support the vehicle. Please see our article on jacking up and supporting your car. Always wear safety glasses whenever you're working under your vehicle.

Begin by disconnecting the battery. Remember NEVER work on your starter with the battery connected!

Begin by locating the ground or negative cable on the battery (yellow arrow) and use a 13mm wrench to disconnect it.
Figure 1

Begin by locating the ground or negative cable on the battery (yellow arrow) and use a 13mm wrench to disconnect it. Place the cable in a manner that it cannot accidently touch the battery post while you are working.

The starter is located on the lower left side of the motor (red arrow).
Figure 2

The starter is located on the lower left side of the motor (red arrow). It attaches to the bell housing by two 17mm bolts. There is not a lot of room to work and there is a good chance it will be very dirty and even oily. Give the starter a quick wipe down if it is oily, as it is heavy and you do not want to drop it once it is free.

There is a plastic cover over the electrical connections on the top front of the starter.
Figure 3

There is a plastic cover over the electrical connections on the top front of the starter. Pop the cover off, and you can see the main electrical connection (red arrow) and the smaller connection (yellow arrow). Remove the 13mm and 10mm nuts and washers holding the wires on and set the wires aside.

There are two 17mm bolts holding the starter motor to the bell housing (red arrows).
Figure 4

There are two 17mm bolts holding the starter motor to the bell housing (red arrows). It is a very tight fit but using a socket you will be able to remove both bolts. The motor will be free with the bolts removed so do not let it drop.

You will need to move the starter (red arrow) around and bring it out from the bottom electrical end first.
Figure 5

You will need to move the starter (red arrow) around and bring it out from the bottom electrical end first.

With the starter out check the mounting flange for dirt, debris and damage (red arrows).
Figure 6

With the starter out check the mounting flange for dirt, debris and damage (red arrows). Also check the starter ring for any rounding of the teeth or damage. Installation is the reverse of removal.


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Page last updated: Fri 12/9/2016 02:38:46 AM