Yes.
Get a statement in writing, saying if the CEL light comes on within the first 30 days, they will resolve the cause at their expense.

__________________
2007 C 230 Sport.

Thanks manny, yes I'll try to have it in writing. But technically what can I do else? connect a OBD II scanner to see if there is any code left?

__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011

---------------------------------------------------------
1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE

If somebody clears the codes & you check immediately afterward with a scan tool, chances are you would not see anything, i.e. codes present or pending.
Aside from that, you could take the car on another test-drive and, before returning to the dealer, check for pending codes.
Is this a M-B dealer you're dealing with ?

__________________
2007 C 230 Sport.

No MB-dealer, a used-car dealer in Fort Worth.
I don't think that MB-dealers have such old cars , even if they took them as trade-in they would dump them to small dealers.

__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011

---------------------------------------------------------
1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE

That's true.
Last time they did'nt even want my 6 year old car on their lot.
Just follow all the steps I mentioned above, before you sign on the dotted line.

__________________
2007 C 230 Sport.

When I go car shopping, I carry my OBD2 scanner with me, and if I'm interested, I plug it in and check for codes as well as the system status for emmissions and such. I also make a deal out of writing down the VIN to run a car fax. I had one used car dealer that wouldn't let me use the scanner, and I walked away, the scanner will tell you if the CEL has a "malfunction".

__________________
2000 C230 Kompressor "Frosty"

2007 PT Cruiser
2001 VW TDI Beetle
1999 Landrover Discovery II
1971 Corvette

Gone: 97 Cabrio, 83 240D, 93 VW Eurovan, 95 Volvo 850, 93 Chevy Astro Van, 77 VW Bus, 99 VW Jetta, 74 VW Bus

Do you happen to know if 1996 E320 (W210) is OBD II compliant? if yes which one of the protocols ISO-9141, ISO-14230(KWP2000), J1850 VPM and J1850 PWM it has?

Thanks for your input!

__________________
1996 E320 since 1/16/08, 171K miles as of Feb 2011

---------------------------------------------------------
1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE

Yes, OBDII was required as of 1/1/96, which effectively was all 96 models. More info on OBDII. http://www.obdii.com/

The second section tells how to tell which communications protocol.