Windshield Wiper Problems
Thread Starter
Senior Member
Joined: Apr 2006
Posts: 463
Likes: 8
From: Long Island, NY
01 E320
Windshield Wiper Problems
I never had wiper problems before but today washer pump motor failed. I'll replace that tomorrow (autozone stocked for $23) but while I was diagnosing I suddenly started to hear a strange sound in my wipers. Sounds lilke a slight plastic scrapping noise coming from the center. They work fine but I remember them always being very quiet and I'm pretty sure this sound is new
I couldnt figure out how to take off the plastic cover over the center of the wiper assembly but it sounds like its coming from there. I'd like to grease the assembly. Can someone tell me how to take it apart?
I couldnt figure out how to take off the plastic cover over the center of the wiper assembly but it sounds like its coming from there. I'd like to grease the assembly. Can someone tell me how to take it apart?
MBWorld Fanatic!
Joined: Oct 2007
Posts: 1,564
Likes: 19
From: SoCal
98 Brilliant Silver E320 Wagon
It pops off.
I believe you may need to remove the wiper arm assembly first. It has a smaller rectangular cover which also pops off to reveal a mounting fastener for the arm. WIS procedure recommends moving wiper to 12 o'clock by turning off the key at the right time when working on the system.
I believe you may need to remove the wiper arm assembly first. It has a smaller rectangular cover which also pops off to reveal a mounting fastener for the arm. WIS procedure recommends moving wiper to 12 o'clock by turning off the key at the right time when working on the system.
Thread Starter
Senior Member
Joined: Apr 2006
Posts: 463
Likes: 8
From: Long Island, NY
01 E320
Thanks. I don't notice the noise now so I'm not going to do anything. I think I just wasnt used to hearing the wipers with the engine off. With it on I don't hear any noise from inside the car.
I purchased the washer pump at Autozone. It's part number 5-861 and is normally stocked in the store. Costs about $23. The autozone replacement works fine but it uses a different harness which comes with the part. You have to splice that in. Additionally it's not obvious which of the existing MB wires are positive or negative so you'll need to figure that out as well. I used a voltmeter. The job took about 20 minutes.
Alternatively you can order the part from autohausaz.com for about the same price (plus shipping unless you have a $50 order) and I think that one uses the existing harness.
I purchased the washer pump at Autozone. It's part number 5-861 and is normally stocked in the store. Costs about $23. The autozone replacement works fine but it uses a different harness which comes with the part. You have to splice that in. Additionally it's not obvious which of the existing MB wires are positive or negative so you'll need to figure that out as well. I used a voltmeter. The job took about 20 minutes.
Alternatively you can order the part from autohausaz.com for about the same price (plus shipping unless you have a $50 order) and I think that one uses the existing harness.
