That's amazing to me - I've never see a US spec SLK without power seats - especially one this nicely optioned! You would expect to see :
242 FRONT SEAT RH ELECTRIC ADJUSTABLE WITH MEMORY
275 MEMORY PACKAGE (DRIVER SEAT, STRG. COL., MIRRO
Datasheets are normally spot on, but errors do happen. I'd really be suprised that this car does not have electric seats. As much as I use mine, I don't think I'd want to be without on the drivers side for sure...
That said, if this is the only thing missing on the car, I suspect Adam would make you a good deal on electric adjustable seat bases! :-)
EDITED : Never driven an SLK without power seats. My C class does not have power seats, and they are quite adjustable (front/back, up/down, recline, and some sort of "tilt" for the seat bottom itself.)
:-) Go say "Hello" to new joiners, you'll be over the limit quickly.
"Adam" is Adamantium on the forum - search the DIY thread. He's managed to retrofit about 10 things that are supposed to be impossible, so at the moment, he's setting the bar.
I suspect that retrofitting the seats would require a control module and a wiring loom. We've got good sources for both, so very doable.
Finding the control module from eBay rather than paying full price from the dealer (same with seats...) is probably the main thing to try and accomplish. I'll look tonight and see if I can find a part number or if it's just part of the front SAM. I'm almost 100% sure it's a separate module...
am so not talented when it comes to this stuff, the fact is these are parts that were intended to be fitted by MB. So it's not like you need to be clever to fit them. The skill is in sourcing the right bits, that's it.
Once you've got them, with this car at least you only seem to need torx drivers and you are there!
My 2005 350 is similarly equipped, and without power seats (I think that the power seats were an extra option in the '05 and became part of a package in '06) - the manual seats do have height adjustment (and well as front/back and tilt). Pretty basic, but work just fine for me.