1999 SLK230 is all over the road when I drive on an uneven surface.

I had the alignment set and changed the steering damper but nothing -- no change.

I'm wondering, could it be in my power steering?

Thanks for the help --

If it were me, I’d start with tire pressure.

Good luck.

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Michael

1988 300 SL (5 Speed)
1994 E320 Wagon
1997 C230

What kind of tires are you running? I see lots of folks trying to save a few bucks on tires and wind up changing the way the car handles for the worse. I imagine SLK's are even more fussy about the tires since they handle like slot cars when they're set up correctly.

Going to a wider tire will cause the car to "track" the grooves along the road.

Changed tires lately?

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car

Still running the original size tires -- checked the pressure it's no different, it's the same as it has always has been.
It's just extremley loose on bumpy surfaces.
Thanks for all the responses

how many miles on the car?

Your power steering is probably fine.

Who did the alignment? Mercedes dealership or a late model Mercedes specialist? Was problem present before the alignment.

If suspension settings and linkage are within tolerance, then shocks.

My 1998 C-230 which didn't come form the factory with Bilstein had it's front shocks totally shot by 75K miles.