2008 S550 4Matic - Alternator Failure
Thread Starter
Newbie
Joined: Apr 2016
Posts: 3
Likes: 0
From: Marietta, GA
2008 S550 4Matic
2008 S550 4Matic - Alternator Failure
today while driving my car completely shut down just before getting on the interstate. Nothing would happen at all, and could not even put the car in neutral.
any one have any suggestions on ways to help keep cost down?
any one have any suggestions on ways to help keep cost down?
Super Member
Joined: Oct 2007
Posts: 643
Likes: 51
From: Southern California
2007 CL550
Why do you think it is an alternator failure? You might have a failed battery. Call Mercedes roadside service. They will come out to your vehicle for free and test your batteries (trunk and under hood). If it is a battery, in most cases they will have one with them and sell it to you at the same price as at a dealer and will not charge for labor. Assuming it is the battery, the will be able to then perform a test on the alternator.
You are eligible for free roadside service if your vehicle was purchased directly from an authorized Mercedes-Benz dealership prior to January 4, 2011 and you still own the vehicle.
You are eligible for free roadside service if your vehicle was purchased directly from an authorized Mercedes-Benz dealership prior to January 4, 2011 and you still own the vehicle.
Thread Starter
Newbie
Joined: Apr 2016
Posts: 3
Likes: 0
From: Marietta, GA
2008 S550 4Matic
Thank you! They paid for the tow ($285 for over 30 miles), but it is still in their shop. My concern is the actual cost. The only warning light that came on was a RED battery box under the messages.
Junior Member
Joined: May 2016
Posts: 46
Likes: 3
From: Spangdahlem, Germany
2011 W221 S550 4MATIC, 2000 W202 C180 WAGON, 1998 W210 E240
Have them check the ECM. Had the same issue and ran through 4 different alternators before they figured out it was ECM not shooting a signal to the voltage regulator
