My SLK 230 1999 45000 miles has just failed its mot on emissions, gutted eh!! Anyway, the mechanic recommended that I change the LAMBDA sensor! Is this a hard job, where is it, how do I do it? Anyone got any pictures of the sensor being changed?
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Hello! My name is Nicole and I'm the proud owner of a 2004 SLK320 hartop convertable, black. I live in New Brunswick Canada. Hence the reason for a HARDTOP convertable for our winters. Hopefully I can contribute at some time down the line information for this forum. Feels good to be amongst other MB enthusiats.
I'm not sure that your car will have a post-cat Lambda (O2) sensor. Wasn't common on UK spec cars at that time, Certainly wasn't mandated.
As for how difficult it is to change, the Lambda sensor looks a bit like a spark plug with a lead attached to it. The lead connects into the loom by plug/socket, so although many Lambda sensors are the same, the different part number call-up the cable and connector too. So it's important to get hold of the right part.
If you can get the car in the air, then it's usually a fairly straight forward job to do. I'd recommend disconnecting the cable first, then thread that through the correctly sized ring spanner. Best way to avoid rounding the nut.