Baby ///M3

Does anyone know the part number for the much-dreaded ABC pump?

Is the part the same for all CL models?

Thanks in advance!

Jon

Baby ///M3

Anyone?

I've recently had my hydraulic pump replaced but unfortunately, if my car sits for more than 10 days, my left rear still sinks/tilts down quite a bit. The dealer has also replaced the left rear shock a few months ago but the problem still persists.

Is hydraulic pump the same as the ABC pump?

Thanks!

Jon

reddog

http://www.detali.ru/cat/oem_mb2.asp...SGR=235&SGN=03

Here're some hydraulic pumps for the 215.375 (CL500).

http://www.detali.ru/cat/oem_mb2.asp...SGR=030&SGN=01

reddog

Here's some info on "vehicle lowering":
Suspension - Vehicle Lowers On One Side or Corner
Date: October 11, 2006
Order No.: P-B-32.50/42
Supersedes:
Group: 32

SUBJECT:
Model 215.373/374/375/376/378/379

Model 220.170/173/174/175/176/178/179, with Active Body Control (ABC) code 487

Model 221.171/176/179, with Active Body Control (ABC) code 487

Model 230.471/474/475/476/477/479

All Model Years

Vehicle Level Lowers on a Single Axle

If you receive customer reports in the above model vehicles of the vehicle's level lowering on a single axle on a single side after an idle time lasting from 1 day to one week, perform the new filter repair method as outlined in WIS document AR32.50-P-0025A instead of the previous flushing method.

Leveling complaints resulting from dirty ABC hydraulic fluid can be rectified just as effectively by filtering as by the conventional flushing method (replacing the hydraulic fluid). The new repair method is possible because the mesh width of the ABC filter was modified from 10 micron to 3 micron. Filtering is of no use if the ABC fluid is dark black or smells burnt. In such cases the hydraulic fluid must be replaced, reference WIS document AR32.50-P-0026A.

NOTE: Vehicle lowering is generally not the result of a malfunction of a suspension strut. The suspension strut can only be responsible for vehicle lowering if it has an external leak. This can be recognized by an oil fouled boot.

NOTE: The revised 3 micron ABC filter entered series production as of October 2005. Part no. A003 184 61 01.

Baby ///M3

Thank you very much for this useful information.

I've had the hydraulic pump and my left rear strut replaced under warranty and my left rear side still sinks like crazy after letting the car sit for more than 10 days.

The filter could very well be the culprit. I'll give it a shot.

Thanks again!

Jon

reddog

i checked with the local MB dealer regarding the filter repair procedure which requires 2 filters. I was told that 1 new filter is installed after all of the old hydraulic fluid and filter are removed. After new fluid is added, the system is connected to their diagnostic equipment and adjustments are made. If all is well,the first new filter is removed and is replaced by the SECOND new filter. This procedure may cost +/- $800.
For preventative maintainence purposes I purchased one ABC reservoir filter #003-184-61-01 @ $42.00 and installed it in place of the original filter.

Stephen04E55

My car went through this exact scenario. The dealer tried the filter for the ABC fluid first and it did not rectify the situation. Later, they replaced a "valve" and it has been fine ever since.