McDonnell Douglas F-4F, West German users

In order to fill the gap between the Lockheed F-104 Starfighter, and the Panavia Tornado, the West German Luftwaffe bought some F-4F which were lighter, downgraded with an APG-120 radar, without the capacity of aerial refuelling and without the capability of firing the AIM-7 Sparrow missile. They were delivered in 1973 under the operation Peace Rhine and some of the capabilities like the aerial refuelling probe, the capability of firing AGM-65 Maverick missiles, the AIM9L Sidewinder and smokeless engines were added later, in the mid 1980s. They were assigned to Jagdgeschwader 71 and Jagdgeschwader 74 based in Wittmundhafen, Lower Saxony and Neuburg, Bavaria respectively.
In 1983 the KWS, which stands for Kampfwertsteigerung (Improved Combat Efficiency - ICE) was started by the Messerschmitt-Bölkow-Blohm company, that refitted the F-4F with an AN/APG-65 radar (the same one as the F/A-18 Hornet), the capability of firing the AIM-120 AMRAAM missile, and digital avionics. A total of 110 were upgraded to ICE standard and they entered service in 1992 and were expected to serve until 2012. All the remaining Phantoms served with the Jagdgeschwader 71 and Jagdgeschwader 74 and WTD 61 at Manching, in Bavaria.
The last F-4F was retired from the Luftwaffe on 29th June 2013 after having scored more than 279.000 flight hours.

Sources:
1. https://en.wikipedia.org/wiki/McDonnell_Douglas_F-4_Phantom_II#Germany
2. Salamander Books - The Complete Book of Fighters