Dealers cause more problems for maintenance? - Mercedes-Benz Forum

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post #1 of 5 (permalink) Old 03-06-2011, 05:54 PM Thread Starter
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Vehicle: 99 ML320
Location: Jacksonville, Fl
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Dealers cause more problems for maintenance?

I had two recalls on my ML replaced, harmonic dampener and power steering clip. Going into the dealer there was really no issues; the "low range" gear problem I had was remedied. Fast forward 4 hours and I park at a CVS only to come out to all sorts of electrical problems when trying to leave: all the lights at the bottom are on, gauges dead, and front and rear wipers will not stop operating despite being in the off position. I turned the car off, when I turn it back on, no still is going wacky.

Get the car towed to my mechanic who sees 15-17 codes. He clears them, goes to drive it in all conditions, wet, dry, mud, hard, stop and codes get thrown. He checks all 4 wheel sensors, cleans all connections, checks resistance of the cables to the wheel sensors. He can't figure it out. He said there's SOMETHING causing it to trip, but in the two days he's had my car he couldn't get it to trip. He doesn't charge me anything again.

He told me the best bet was to take it to the dealer and explain the problem, explain what he did, and have them hook it to a machine that checks the continuity and resistance of each harness so we can know exactly what's going on if every other sensor is good. Apparently there's over 13 miles of wire in the ML. He said the confidence in knowing what has already been done to find the problem when explaining it to the dealer vs "I have a check engine light on and this is happening" should keep them from completely raping me, lol.

I get home, rest for 2 hours, then run errands. This errand run trips something and although it wasn't crazy with the gauges dying, etc it did go to low range and now the check engine light is back on. WTF? I didn't have any of these problems before taking it to the dealer to get these recalls fixed, now I have all sorts of electrical bugs. This car is driving me crazy. Aside from the electrical sensory nonsense, it drives amazingly and runs well. But this kind of crap makes me want to go back to driving my old 63 Beetle. No electronics, no frills, just pure car.
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post #2 of 5 (permalink) Old 03-06-2011, 06:43 PM
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Clearly that dealer did something wrong. If there is any reason to use them for service is a 12/12,000 mile warranty on the work they perform.

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post #3 of 5 (permalink) Old 03-06-2011, 08:31 PM Thread Starter
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I think it's just too hard to prove that THEY did something wrong. Given the fact my mechanic drove the car for 30 miles around town trying to get it to trip, and the little bit of driving I did to it will probably make them that much more resilient to the accusation.

It's just so frustrating to bring a car to a dealer and THEN it starts having problems. It's so difficult to prove otherwise. Brumos Mercedes FTL.
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post #4 of 5 (permalink) Old 03-08-2011, 01:33 AM
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should have called mb roadside and had it towed back to dealer

however it is not unheard of things failing unrelated. i've left car, picked it up with a cel fault was something completely unrelated to anything anybody would have touched/done since me dropping it off.

vw phaeton. when vw copies mercedes, but forces you to service it next to golfs and jettas
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post #5 of 5 (permalink) Old 03-08-2011, 02:12 AM
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Quality assurance... cannot get around the fact that, in all facets of life, most people graduate at the bottom 95% of the class....


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