Date registered: Jan 2010
Vehicle: 99 E430, 01 E430 Sport, 00 SL500
Location: LA, CA
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
I suspect transmission is acting up. When, what was the last service done to the car? Was it really cold last night?
Worst case is transmission is going bad, it's costly. However, a simple fix for it may be just some fluid addition. But transmission fluid should not need to be added unless there was leak. Most of us don't look where the car was parked for signals to anticipate car problem caused by leaks. I suggest not to drive the car until someone can check it out,; driving it may worsen the problem. Meanwhile, your can carpool or rent a small car for a week because her MB can stall at any moment unexpected.
W210 forum got great info in the stickies for transmission problem or related problems.