Sounds like from your description, your problem is lack of maintenance. the ball sockets at the end of the linkages on top of the valve cover and one that goes down the back side of the IP, need to be lubricated once in a while. Inside the cup part is a little wire clip, after while it will break and jamb up the movement of the ball/socket.
Normally the ball/socket will pop apart with a little pressure. If they are very rusty they become difficult to separate and will bent the rod getting them apart. the end are replaceable form Phill. or get a few at the JY.

The FSM call for the use of ATF, but any thing will help to keep them lubed.
I take mine apart a couple time a year, clean them and regrease.

I agree with checking the peddle on the floor for accumulation of dirt and a worn bushing.
James has the red circle on the firewall. that swivel has a plastic ball "roller skate wheel" on the back side that can crack and cause stiffness in the movement. that thing is a $50 part.

If this one line you said is an indication with your association with your MB [but depending on the cost and time I may have to get rid of the car,] It will take cost and or lots of time to keep these on the road.

No such thing as a cheap maintenance free car in any brand.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works