Replaced 4yr old traditional lead acid battery with AGM type off ebay for $129 and free shipping.
The absorbed glass mat holds closer to 13 volts vs 12.4 in a lead acid, and gives the Xfire a really nice startup.
Replaced the Radiator.
And since I was in there, new hoses!!
Excellent built car as its only a few minutes to remove fan and rad. Longest parts time wise were draining fluid and cleaning everything, like engine tray, and around rad/fan.
After a good cleaning of area swap took about an hour. Thank you MB engineers.
The new rad came with plugs in all the orfices.
These line plugs came in handy for plugging the trans lines after cracking them open. I bought a transmission dipstick and checked the level BEFORE, it was a bit high at warm.
Using plugs to quickly cap off lines there was only a small puddle lost. After reconnecting hoses and filling radiator with special european flavored fluid I started engine and checked for leaks, bravo no drips.
Just let it idle, rechecked fluids, alll seemed good.
Drove it around and even ac felt cooler (probably more air flowing through now) and temps on gauge read lower than before.
Will check again after a few miles but seems perfect.
Reason for rad swap was the overflow line plastic nipple cracked, then broke off the rad.
Ready for summer heat now!!

See my gratuitous Xfire engine shots