Benton, I did a keyless entry on my '94 C280 last weekend. It was a snap. Less than $100. I'm also the guy who wrote up the installation for W124. C280's even easier. Do a search on keyless entry c280.

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Bill Streep
San Antonio
'57 190SL (toy)
'08 S5500 (mine)
'09 CLK550 (wife's)
'06 SLK350 (daughter's)
'11 GLK350 (daughter's)
'03 CLK310 (spare)