My Mercedes clk 230 komp has an issue withe the front passenger wheel. when pulling away on full lock right, its like the tyre is running on flat and it starts to knock. everything seems ok wheel bearing has a little play but not too much as it should all joints and bushes seem ok. any ideas? ps drives fine

Question edited for clarity.
Question moved to sub category.

How 'random' is the random spare tire? They come with a spare tyre.

Undo the nuts with a wheel spider, or put a pipe on the supplied wheel wrench. Hit the wheel from behind with a big hammer, or a 2 x 4 end on.

What do you mean by "do not run"?
The 32x11.5x15 tyres are both taller AND wider than the 31x10.5x15's. Rubbing will depend on suspension set up, weight of the vehicle and what wheel arch liners are fitted. You can try fitting one with the vehicle off the ground.
Chock the wheels and raise onto axle stands. Fit the wheel and spin it by hand while it is still raised. Listen for rubbing. If it is the front of the vehicle spin the wheel at full left steering lock and at full right lock. With only one wheel fitted lower it back onto the ground to get it's full rolling weight onto the tyre.
SLOWLY drive it forward, accelerating gently. DON'T go over 30mph,(50kph)' or you risk bursting a tyre. When safe to do so drive a figure of 8 at full steering lock. If you hear ANY rubbing you will need to find out what the original 'stock' size was and use that. To use larger tyres and rims you usually need significant suspension modifications to allow for the extra wheel size.

MB doesn't use a reset switch (AKA Inertia switch) for the fuel pump

Does the noise only occur at or above a specific speed? I'm hoping for your sake that one of the plastic fender liners or under carriage covers have come loose and are flapping in the wind or against the wheel when you pick up speed? If a tight turn instigates it then my thinking is that the dislodged cover is caught by the wheel at full turn (the clunk) and then flaps and rubs while you drive?

Pull fuse until u figure out problem

You must get transmission service done. it will replace the pilot bush in your transmission your car have a 5 speed tiptronic transmission it's need to get transmission service done at every 65000km otherwise you will get problem. seems to be leaking from pilot bush.

Not 100 percent sure on the 2000 model, but on the late 90' models the blower was located under the hood, under the plastic panel located close to the windsheild...tg

may be a bent wheel or egg shaped tyre, with the roads as they are even a pot hole can cause damage, try a visit to your local tyre dealer for a free check, most will be happy to advise

yes as far as i am aware they had a 30 year warrantee and changed it to 10 year (makes sense) was told this by merc owner (dad)

1. Try cleaning the front brake senor.
2. Replace brake switch (under dash).
3. Check front brake pads for wear.