Ceramic holder is not your answer and it has a long lead time if you have to special order. It is bad connection as per other members opinion. Just clean the fuse holder, do what other members suggested and put a good plastic fuse in ( copper or aluminium are the SAME ). Mercedes has been using plastic fuses for a long time. You can change it out later if you really want to go with ceramic.

Good luck.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.