Rear wiper relay, location - GF54.15-P-1515-01GB

MODEL 463.243 /244 /245 /246 /247 /249 /270 /271 /322 /323 /332 /333 /340 /341 up to 31.5.12 

MODEL 463.248 up to 31.5.12 except CODE (979) Special protection version 

Fig 1: Identifying Relay Connector, Relay Holder And Rear-End Door Wiper Motor Relay

Courtesy of MERCEDES-BENZ USA