The BAS/ETS/ABS lights illuminated on my 2002 ML320. Since nothing seemed wrong, the driver kept running errands for the next few hours. When the car returned home, there was a noise from left front of engine compartment that sounded like a bad bearing or burnt out pump. Noise continued after the engine was turned off. Pulling the ABS pump relay (K25) stopped the noise, and replacing it (with a new one) a few minutes later resulted in the dash lights going off, no more noise, all's fixed.

Question: the root problem was obviously the stuck relay, but the noise concerns me. Would the stuck relay (for several hours, at least) have damaged something, maybe a pump that I won't know is damaged until I need ABS?! Or just temporary overheating? Any diagnostics I should do?

Thanks.

I drive a 1987 300D and have a "tacka-tacka-tacka" noise coming from the ABS pump area of my car when I apply the brakes. The noise is worse when the car is cold, and is quieter when the car warms up. Could that be the relay, or would you suspect the pump itself? Can that pump be rebuilt, or do you just have to replace it? They cost like $250 from a bone yard!

__________________
1987 Mercedes 300D ~200K (Greasecar & Biodiesel)
1993 Ford F-250 7.3 IDI diesel 165K (Biodiesel)
1996 Thomas/International Bus with DT466 engine

I have 00' ML320 and last night the same thing happened to me - the pump stayed running after engine off and car even locked. Disconnected battery to stop it. I'll pick-up a new relay today as a precautionary measure.

My pump ran for a good couple hours. Any damage to occur to an ABS pump for running this time?

Gilly? M.B Doc? Bueller? Bueller??? Any input appreciated...

Many Thanks
Autobahner