 Our ML320 is a tank. It's been serviced well & have had no reliability issues. But, the electrical problems. These repairs cost **$$$$** so we have lived with them.   Odometer light went out,  radio has to be manually turned off/on,  gas mileage tracker quit working.  Once, when it was parked out in the rain, it freaked out & the interior lights and whistles went off and flashed until we turned the car off.  We park it in the garage now.  A life saver in the snow - the four wheel drive was awesome (live in FL now - it's awesome on soft beach sand).  We need a third row, though. The children are going to kill or maim each other soon in that back seat. We are trading it in soon.  