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|M-Series (M1, M3, M5, M6) General M-Series Discussion - If it does not fit into a more specific M Category above, please place it in here. In addition, previously archived M-Series discussion is located in this section.|
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Originally Posted by DREWK
Hello all - I'm new at the forums - just took delivery of my '06 M5 on April 7th after waiting for it to be built to my specs in Germany, and have had a nightmare of an experience thus far. The following problems are still undiagnosed, as my local BMW service dept. had my car for 10 working days and was unable to find the problem. I'm at my wits end and am crushed that I can't enjoy this car - any insight or advice is appreciated beyond words....
Upon ignition the following errors start to show up in my idrive display :
Increased Emissions! (this is always first)
Start-Off Assistance Inactive!
Engine Malfunction/Reduced Power! (this of course comes with the engine effectively cutting itself in half, so the car's power is completely gone).
What's odd is, the other Idrive status screen shows that all is well, so some part of the computer is very confused - it's unlikely that all of these things are actually wrong with the car, so everyone involved sees this as a communication or software or connection error. However, I took the car to BMW at which time they immediately diagnosed the problem as a bad DSC sensor, which was causing the whole system to go haywire. They replaced the DSC sensor - that didnt solve it. They then replaced the entire control module that's part of the DSC/SMG system - that didn't solve it. They checked all of the wiring - everything ohmed out fine and checked out OK. They re-programmed the software 3 or 4 times - didn't solve it.
After 10 days of being promised my car back, I decided to go in and get the car back from BMW for the weekend last Friday just so we could all clear our heads and regroup. I mentioned that I had the K40 integrated radar detector and the Blinder laser diffusers installed (hard wired not bluetooth) right before the error messages began (in fact it was the day before they started popping up.) The service foreman and I called the company who installed the radar/laser system to find that they wired for power via the brake relay - which is the way they had done it on several M5's with no issue. BMW highly doubted this was the problem, but agreed there was an outside chance due to them just not knowing enough about the car yet - they unhooked the system from power and let me try the car out over the weekend. Well, I had no errors for a week - drove 100's of miles stopping and starting the car 6-8 times a day - no errors, no issues, nothing. So, deductive reasoning would lead one to believe that the laser/radar system was improperly installed and was the root of the issues.
So, I went back to the company who installed my radar/laser, explained the problem, at which time they thought that the only potential problem might be a backflow through the wiring causing the computer to go haywire. So, they attached a diode to prevent the backflow and sent me on my way. Two hours later, bam! Every error message popped back up and almost caused me to just drive the thing off the bridge with me securely fastened in. I've since de-powered the laser/radar system to no avail - it's completely unwired for power and Im still getting these errors and subsequent power-downs every time I start the car.
Has anyone else run into this type of situation? BMW Service has gone as far to call BMW Corporate to admit defeat and ask for help, but have received no course of action - so we're stuck here. (well they claim they called I cant vouch for sure.) I've waited my my entire professional life to buy an M5, only to be cursed with a car that now drives like a $100,000 Corolla. Someone - Anyone - please help!
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