I have 2004 CLK 320. The top went down OK, then a few days later it does not close. Any suggestions? Thnaks

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.

Depending on kilos... Ive heard there is an oil filter on the sump.

Also remember the necessary fill volume varies with temperature.

If the "black part" you are talking about is the "trunk partition"(which should come up as a "fault" on the dash when you try and cycle the top) then there are several things to check. The partition itself should snap into the retracted position(forward), and back. If it doesn't there are two struts(also called air springs) that have lost their charge and are not holding the partition in place. It has to be held solidly in place to set the switch on the left side(driver side) in order for the top to go down. If it's at all floppy, it won't set that switch and the top won't cycle. I've found the hard way this is a common problem.

Can you hear the convertible pump running at all when you hit the button. Most are hydronic. It might be low on fluid. Either that or check the relay

When I try to start my merc clk 2003 the horn blasts but has been fine all day. Any suggestions?

Sound like the ISC actuator it part of the throttle body, and its a reversible motor, it maintains idle speed stability its a motor actuator,and is part of the throttle body but just dont condemd it sevice the throttle body this acuator motor sometime has a hard time moving to adjust RPM.Then there is the MAF(mass airflow sensor) even though this measures good or bad it does not set a code or Check engine light,
Here the most probable cause MAF they have problems on MBZ CLK 320 and only a fuel trim reading can detect problems with this sensor, dont be dependent on ck eng light it wont show, then there is the MAP manifold air pressure after coming to a stop sign the EGR may still be open and not close properly causing the stumble and this wont give a code. So here is the most probable cause the MAF mass air flow going out of range causing lean fuel trim or the EGR pintle not closing properly stumbing the vehicle , so I leave you with MAF or EGR either one or the other or both or just replace both

soft top roof modual under the near side seat needs a new one also there are 15 sensors you need to put it on a diognostics

you will need to reprogram system

It is normal for the roll bar to rise when top is down. It seems like the rear valance cover is not secured and the soft op does not understand what position it is in. There is a way to manually close top. it is stated in your owners manual. also I would try to close top with button(assuming your vehicle will start and the battery has good voltage) start car and try to operate top down and try pushing on rear cover also make sure the retractable cover in trunk is extended to compress operation switch

Try using the all windows up and down button (Drivers side on door), evidently after you change your battery this is the reset proceedure.