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Try this : https://search.yahoo.com/search;_ylt=AhBIqFUY18sRXDQ0g06QcWebvZx4?p=how+to+replace+2002+mercedes-benz+ml500+brake+light+switch&toggle=1&cop=mss&ei=UTF-8&fr=yfp-t-764&fp=1
Not wheel bearing, but any other suspension part could be suspect. This includes ball joints and most likely stabilizer bar end links.
Here you go : http://www.pelicanparts.com/BMW/techarticles/BMW-3-Series-E46/08-ENGINE-Idler_Pulley_Replacement/images_med/pic01.jpg
Have you checked the neutral position safety switch or the ECM main relay? When the neutral position safety switch fails, you get zero crank and zero spark.
Hard to say for sure. With vehicle running, try spraying carb. cleaner on the vacuum lines. When the engine suddenly surges, you have found the bad line. Make sure none of the hoses is squeezing shut when vacuum has engaged.
Multiple possibilities. Failed brake pads or shoes, wheel bearings, etc. Check rear wheel bearings but need more info. or take to shop for diagnosis.
Yes, when possible never go to a dealer for repairs. Shops and local mechanics will always quote a much more reasonable price. Example: I called Nissan for a vehicle I was repairing that needed a front half-shaft they quoted $579 dollars for the part. Autozone had it for $90 dollars. Shop around.
Not always. Sometimes you can use them again if they are in great shape. Replacing them is always recommended though. If you are confident in their condition, replace brake pads only.
No, this is a vehicle theft code. It may be a faulty ignition key. If you have another key, try that one instead. Disconnect the battery and wait about 15 min. then reconnect and try the key. You may have to tow to a dealership and have them reprogram the security portion of the PCM. http://www.thedieselstop.com/faq/9497faq/tsb/tsb/files/010602.pdf
Once leak is located you can try this : http://www.autozone.com/autozone/accessories/J-B-Weld-Waterweld-white-epoxy/_/N-25y6?itemIdentifier=921984&_requestid=13330459