Future S55 AMG Owner?

I'm looking to buy a 2005 S55 AMG. This would be my first AMG model car. A little about the car, it's meticulously clean car, ~78K miles, 2 owner car. The gentleman would like $15,500 OBO for the car.
Questions:
1. Is KBB typically close on book value? Reason I ask is, all of the other S55 AMG models I run into about the same price, it's typically higher. According to KBB it's worth about a little over $14K.
2. Any known model issues I should look for in a 2005 S55 AMG?
I appreciate you guys reading my post! Thank you in advance! I look forward to being a contributing MB member!
If money's not an issue and you don't mind visiting your mechanic often, go get it and enjoy!
I honestly think you're doing the seller a favor by taking it off his hands, I'd lower your offer.
Last edited by islandbeef; Mar 12, 2015 at 01:30 AM.
Seller doesn't want to give the car away nor do I want to dump a bunch of money right away to fix ABC issues. I guess at this point I'm inquiring about the likelyhood that the seeping ABC is going to turn into a costly headache in the near future?
I forgot what it was called, but it fixed the issue until the right side failed! Cost roughly 5k in 6 months just for that issue alone, excluding service a/b, engine mounts, rotors, etc. So unless you can have the owner drop or fix the known issue with ABC, I would run!
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That said, and if you've budgeted for it - they're fun & great cars!

Another problem you are gong to have on your 722.6xx transmission is the electrical connector plug. This problem is and can be very expensive if the ATF gets into the TCU. I would get the transmission oil changed properly, meaning have it extracted through a vacuum system and have the electrical connector plug changed at the same time with an original Mercedes part.
Also, at some point in your ownership of a W220 S55, you will see oil leaking around the valve cover gasket and the oil breather section. You will have to get the gaskets changed and the top part will need sealant. Cleaning the old sealant will require time and patience.
These are some of the main issues with the M113K engine, however, these are fantastic cars. My 2004 has only 48,000 miles and it's in pristine condition and i love her to bits.
Hope this info helps and happy driving friend.
I was able to get out to the end of 2017 or 30,000 K (whichever comes first) for a little under $4K when I purchased my 2005 S55 in January.
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Cheers,
maw
Check out Howard's recommendations for maintaining the W220 systems.
("Soylent Green is people" --Charleton Heston?).




Other problem was with the supercharger clutch, when it engaged it made a chirping noise, it was repaired under warranty at 32K miles.
Besides that no other issue for 4 years of ownership.




