What are the German Constitutional Court's public approval ratings?  How
high/ low does the German public rate the German Constitutional Court? 
How do the Court's ratings compare with the public's opinion of other
branches of government (e.g., Parliament)?

Dear hmbiii,

Here is survey data on the amount of public credit German institutions
(including the Federal Constitutional Court) enjoy, from the years
2000, 2001 and 2003:


Bundesverfassungsgericht = Federal Constitutional Court
Bundeswehr = Armed Forces
Bundestag = Federal Diet (Lower House of German Parliament)
Bundesregierung = Federal Government



Infratest dimap: "DeutschlandTrend Januar 2003" Survey Results
Credit of Institutions

Institution ----- Credit: much - some - little - none

Bundesverfassungsgericht...15%....53%....23%......4%
Bundestag...................2%....34%....53%......9%
Bundesregierung.............0%....25%....56%.....17%
Labor Unions................1%....25%....49%.....20%
Employers' Federations......0%....24%....54%.....13%
Political Parties...........0%....14%....68%.....15%




Infratest dimap: "DeutschlandTrend Januar 2001" Survey Results
Credit of Institutions

Institution ------- Much/some Credit - little/no Credit

Police.....................80%...................18%
Bundesverfassungsgericht...76%...................15%
Bundeswehr.................56%...................38%
Courts.....................54%...................41%
Bundestag..................54%...................44%
Television.................39%...................58%
Press......................37%...................61%
Bundesregierung............52%...................47%
Labor Unions...............39%...................56%
Employers' Federations.....38%...................54%
Churches...................35%...................61%
Major Enterprises..........37%...................56%
Political Parties..........34%...................62%




Infratest dimap: "DeutschlandTrend Januar 2000" Survey Results
Credit of Institutions

Institution ------- Much/some Credit - little/no Credit

Police.....................81%...................18%
Bundesverfassungsgericht...75%...................16%
Bundeswehr.................65%...................31%
Courts.....................53%...................42%
Bundestag..................49%...................48%
Television.................49%...................49%
Press......................47%...................51%
Bundesregierung............47%...................52%
Labor Unions...............38%...................56%
Employers' Federations.....36%...................56%
Churches...................35%...................62%
Major Enterprises..........32%...................63%
Political Parties..........24%...................72%




Sources:

Infratest dimap: "DeutschlandTrend Januar 2003" Survey Results
http://www.infratest-dimap.de/POLITIK/deutschlandtrend/dt0301/dt0301home.html

Infratest dimap: DeutschlandTrend Januar 2001 Survey Results
http://www.infratest-dimap.de/POLITIK/deutschlandtrend/dt0101/dt0101home.html

GESIS: Moral und Skandal - Vorwort
http://www.gesis.org/Information/SowiNet/sowiOnline/pol_skan/polsk01.htm


Search terms used:
bundesverfassungsgericht vertrauen umfrage
://www.google.de/search?q=bundesverfassungsgericht+vertrauen+umfrage&ie=UTF-8&hl=de&btnG=Google-Suche
infratest
://www.google.de/search?q=infratest&ie=UTF-8&hl=de&btnG=Google-Suche
"vertrauen in institutionen" bundesverfassungsgericht
://www.google.de/search?q=%22vertrauen+in+institutionen%22+bundesverfassungsgericht&hl=de&lr=&ie=UTF-8&newwindow=1&start=0&sa=N
vertrauen institutionen 2003 bundesverfassungsgericht bundestag bundeswehr polizei
://www.google.de/search?q=vertrauen+institutionen+2003+bundesverfassungsgericht+bundestag+bundeswehr+polizei&hl=de&lr=&ie=UTF-8&newwindow=1&start=0&sa=N
vertrauen institutionen 2002 bundesverfassungsgericht bundestag bundeswehr polizei
://www.google.de/search?q=vertrauen+institutionen+2002+bundesverfassungsgericht+bundestag+bundeswehr+polizei&hl=de&lr=&ie=UTF-8&newwindow=1&start=0&sa=N


I hope that this data will be useful!
Best regards,
Scriptor

Scriptor's answer was very helpful.  Much thanks!