I have NOT put a proper MBZ battery in my cars for a while as Costco don't carry them. I just look for one at Costco with the + terminal on the right hand side and with similar height and bought them. They never give me problem but I am in SoCal and the temperature is always mild and cars are in garage. I have even put a battery with + terminal on the wrong side for a while as a workaround, I just extended the cable.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.