Greetings - proud owner of a 1987 300d turbo. Owned a few w123s and I have to say I am quite impressed! Took her to the local dealer and they did the trap recall and that seems to have improved the non-turbo speed.
Being that I am kind of a newbie with the w124, I have a few questions for those that may have the answers....
Sluggish off the line - I think this has to do with the Alda. I found a how to on here and will give it a shot to see if it helps.
Just did an oil change and was supposed to find what are called "sound encapsulation panels" on the underside of the car. I removed the front one to get to the oil pan. Problem is that the screws that held in in place will no longer thread to the frame. I have it up with some ties, but this is only a temporary solution. Anyone had an experience with this? Better to remove them? I kind of like the idea of an "oil catch".
Heater gets cold at low RPMS - I had a similar problem with a w123 and was able to solve it by replacing the "mono valve". I do not see one on the w124, any suggestions as to what the equivalent is to the mono valve on a w124?
Drivers door lock - looks like the key lock on the drivers door has been jimm'd or something. Is there and easy fix for this, or would a locksmith be a good place to start?
Oil Light - comes on when the car is taking a quick or sharp turn. Just for a moment. Would assume this is just the old moving about in the pan and the sensor is not submerged in the oil for a second. But wanted to see if maybe that is the sign of a bad sensor to come.
Steering - feels a bit tight. Not like any other w123. Tires seem to be ok, but I guess they could be the problem. However, when I got her, the fluid level was low. I drained, replaced the filter and added fresh, but still seems a big tight. Is this the way a w124 rides, or do you think there may be an issue to check out?
Don't have many pics, but here are a few of my phone. Being unloaded and the engine before cleaning.