2008 W216 CL500 - yellow warning 'ABC Malfunction'
Thread Starter
Newbie
Joined: Apr 2020
Posts: 7
Likes: 0
2008 CL500
2008 W216 CL500 - yellow warning 'ABC Malfunction'
Hi there
I drive an early W216 CL500 (we call her Brunnhilde).
About 4 weeks ago I got the dreaded humming sound at below 2000rpm. £2k later at an MB main dealer, and she has had a new tandem pump and a hydraulic system flush. Hurrah!!
Fast forward 2/3 weeks. Yesterday, after 10 minutes of driving I get a yellow warning on the instrument cluster: 'ABC Malfunction'. Oh dear.
When I get home, I have a little look around and notice a puddle on the floor by the front left wheel. I had noticed this about a week ago but (for my sins) thought nothing of it (we park in a basement carpark and sometimes get little puddles from run-offs etc). I touch the fluid and it is slightly greasy.
This morning, when the engine is cool and off, I check the hydraulic fluid level. It is 1 inch off the bottom of the dip-stick. I also wipe the fluid off the floor - it has a pale green colour.
I deduce I have a hydraulic fluid leak somewhere.
Question: is it more likely that:
A) something was not reconnected properly/tightly when the tandem pump was fitted, resulting in a slow leak; or
B) I have a leaking hydraulic hose somewhere, unrelated to the tandem pump replacement.
My feeling is A), but only because of the proximity in time to the tandem pump replacement.
Many thanks (and sorry for the long post!!).
Matt
I drive an early W216 CL500 (we call her Brunnhilde).
About 4 weeks ago I got the dreaded humming sound at below 2000rpm. £2k later at an MB main dealer, and she has had a new tandem pump and a hydraulic system flush. Hurrah!!
Fast forward 2/3 weeks. Yesterday, after 10 minutes of driving I get a yellow warning on the instrument cluster: 'ABC Malfunction'. Oh dear.
When I get home, I have a little look around and notice a puddle on the floor by the front left wheel. I had noticed this about a week ago but (for my sins) thought nothing of it (we park in a basement carpark and sometimes get little puddles from run-offs etc). I touch the fluid and it is slightly greasy.
This morning, when the engine is cool and off, I check the hydraulic fluid level. It is 1 inch off the bottom of the dip-stick. I also wipe the fluid off the floor - it has a pale green colour.
I deduce I have a hydraulic fluid leak somewhere.
Question: is it more likely that:
A) something was not reconnected properly/tightly when the tandem pump was fitted, resulting in a slow leak; or
B) I have a leaking hydraulic hose somewhere, unrelated to the tandem pump replacement.
My feeling is A), but only because of the proximity in time to the tandem pump replacement.
Many thanks (and sorry for the long post!!).
Matt
Thread Starter
Newbie
Joined: Apr 2020
Posts: 7
Likes: 0
2008 CL500
I'm mainly sad I won't get to enjoy the car for a little while!
Member
Joined: Feb 2020
Posts: 160
Likes: 66
From: Lake Stevens, Washington
2014 E350 & 2017 GLE 400
Unfortunate for you, In my area (Washington) sales dept. are open by appt. and service dept are open and if your not comfortable bringing your car to them they will come and pick it up and return it when the service is finished.
Trending Topics
Thread Starter
Newbie
Joined: Apr 2020
Posts: 7
Likes: 0
2008 CL500
UPDATE
It turns out that the small hose between the hydraulic fluid reservoir and the tandem pump (which hose apparently carries the hydraulic fluid at its highest pressure) had degraded and was leaking. Fortunately this is a cheap and quick repair!
It turns out that the small hose between the hydraulic fluid reservoir and the tandem pump (which hose apparently carries the hydraulic fluid at its highest pressure) had degraded and was leaking. Fortunately this is a cheap and quick repair!
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
