Lifetime Premium Member
Date registered: May 2006
Vehicle: 2001 E320 - Brilliant Silver/Ash: 107,000+
Location: West Virginia, USA
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Quoted: 6 Post(s)
I think the batteries are also used in wrist watches, and I bought a pair of extras at the local WalMart for about $6.00 (2025 as Diesel Benz wrote). The way to open the smart key to access the batteries is in the owner's manual, and it also tells you the battery type.
My dealer is now using Mobil One 5W40, but I'm not positive it is the "ESP M" variety.
Mercedes Benz - Das beste oder nichts!
Last edited by Musikmann; 08-02-2007 at 05:00 PM.