[C230Kto380SL]

The problem is that it is really very intermittent, in my case maybe once a month, but always under the same conditions - driving at low speed through my condo parking structure. The car would just make 2nd gear before I had to ease off the gas.

That would lead me to question the source being a faulty part.

I know it sounds like a petty issue, but when this happens, the rear wheels lock up momentarily, sending you lurching forwards.

BTW, to amplify my earlier post re the battery, you can tell whether your car was a part of the recall by the big stickers placed over the original battery maintenance info in your owner's manual.

To be fair, in my case the battery explosion was triggered by me opening my cell-phone as I reached into the trunk to get my things. Nonetheless, my trunk was obviously and abnormally full of explosive gas from the battery. All it needed was a spark..