Dead battery Issues
Now the real reason. I sent car in to the shop. They said I need to replace my entire cluster and replace my fuel sending unit and pump. roughly $2600 and $1200. Do you think it is just that I need my code cleared and may be it is a software issue? Especially after my battery previously died. Also, are those prices accurate?
These cars are quite finicky when it comes to batteries dying or being disconected, more times than not I have had to do a hard reset after disconnecting my battery, it has worked every time for me.
Good luck.

Try a hard reboot of all micro processors by pulling the negative terminal of the battery.
If this does not work get a second opinion.
Also pull codes with an OBDII scanner & post.
There is no way that changing a battery can damage the fuel senders & pump - that would be pure coincidence. The cluster is also unlikely.
Its times like these that remind me why I used to frequent these boards. Great friends, cars, and advice. I think the only reason I stopped was because I was going broke/broke and wanted all the mods and goodies that I saw on here and couldn't have them

The cambox gasket might not be the cause of the leak. It might be the cam bore expansion plugs.
See here:
https://mbworld.org/forums/clk-class...et-sealer.html
And back to topic, this actually sounds like a blown SAM. The rear SAM controls the fuel sender. If it's throwing "crap" across the CAN bus, it could cause problems on the cluster. One of the most common causes of a blown SAM is using improper procedures when trying to jump-start or change a dead battery. Some shops use these plug-in devices in OBDII connector to provide 12v to retain your settings. MBZ's don't like those. You're better off just dealing with your lost settings, which really just involves resetting the clock (unless you have COMAND). ESP and the auto-close function of the windows and sunroof. The radio keeps its presets.
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And back to topic, this actually sounds like a blown SAM. The rear SAM controls the fuel sender. If it's throwing "crap" across the CAN bus, it could cause problems on the cluster. One of the most common causes of a blown SAM is using improper procedures when trying to jump-start or change a dead battery. Some shops use these plug-in devices in OBDII connector to provide 12v to retain your settings. MBZ's don't like those. You're better off just dealing with your lost settings, which really just involves resetting the clock (unless you have COMAND). ESP and the auto-close function of the windows and sunroof. The radio keeps its presets.
OT Rodney
Both 112 & 113 have expansion plugs. They are different to 272/273. Not cam bore.
23 A 403 997 06 20 .EXPANSION PLUG
TO PLUG CORE HOLES 006
23 A 403 997 06 20 .EXPANSION PLUG
TO PLUG AIR-INJECTION BORE 002
35 N 000443 3028000 .EXPANSION PLUG
CYLINDER HEAD, RIGHT, WATER JACKET AT REAR
Replaced_By: N 000000 0004332 001
35 N 000000 0004332 .EXPANSION PLUG
CYLINDER HEAD, RIGHT, WATER JACKET AT REAR 001
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These "cam plugs" that leak on the M272/M273 engines are not for expansion; they are for service access to the cams and they are on the oil side. Basically, you remove these plugs so that you can manually rotate the left-bank cams when replacing the timing chain so that it locks into the tensioner.



