Yes - an old thread - but I wanted to tack on my experience thus far to an existing one that had a post that might be relevant to my situation. See above - post #11 in this thread.

Yesterday I was returning from a 40 mile drive. Backed into the driveway as I always do. Transmission obviously in REVERSE. I'm hearing a clicking sound as I roll down my driveway - slightly downward incline. Sound reminiscent of a playing card hitting bicycle spokes. For the younger crowd who may not be familiar with this - kids used to hook up a playing card to a spot near the wheel spokes and let the spokes run across the card. 50s era entertainment.

So I drove up the driveway and backed down several times - each time hearing this clicking sound. First time I've experienced this. Internet search brings up all sorts of bad news.

I took the car out again this afternoon for another drive and on return rolled down the driveway with foot off the gas this time. I usually feather the brake pedal a bit. No clicking sound. Repeat - up and down the driveway many times - foot off gas - no clicking sound.

I then went thru a series of backing up feathering the brake pedal. Each time I'm hearing the clicking sound when feathering the brake. Let the car roll down w/o braking and no clicking sound.

In the days ahead, I'll pull the transmission pan and check for chunks of things that don't belong. As with many of these older MB sedans, there is a slight delay going from PARK to REVERSE. Maybe a secs. - has been doing this for many years.

Will also examine Emergency braking system and the brakes in general. All fwd. gears are smooth including shifting from one gear to the next.

If I find anything worth mentioning - I'll report back to this thread.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"