This paper is concerned with practical quantizer design for Compress-and-Forward (CF) in combination with Orthogonal Frequency Division Multiplexing (OFDM) in the 3-node relay channel. The Information Bottleneck (IB) method is an appropriate tool for this task as it maximizes relevant information given a specific restriction on the rate. Optimal quantization is not possible due the high complexity (dimensionality) of the problem since channel knowledge needs to be considered in addition compared to an Additive White Gaussian Noise (AWGN) channel. Therefore, recently introduced Information Bottleneck Graphs (IBGs) are used to simplify the problem. In this work, IBGs will be extended to exploit as well side information as stated by Wyner and Ziv. Furthermore, different IBGs will be distinguished to find the best trade-off between feasibility and exploitation of as much information as possible. Results in terms of achievable rates with a Bit Interleaved Coded Modulation (BICM) scheme reveal that the derived approaches lead to a better overall performance especially the more side information is considered at the relay.